diff --git a/Aircraft/Instruments-3d/clock/M877/M877.nas b/Aircraft/Instruments-3d/clock/M877/M877.nas
index e79a7bce1..42d989b21 100644
--- a/Aircraft/Instruments-3d/clock/M877/M877.nas
+++ b/Aircraft/Instruments-3d/clock/M877/M877.nas
@@ -1,58 +1,101 @@
-var davtron=props.globals.getNode("/instrumentation/clock/m877",1);
-var set_hour=davtron.getNode("set-hour",1);
-var set_min=davtron.getNode("set-min",1);
-var mode=davtron.getNode("mode",1);
-var modestring =davtron.getNode("mode-string",1);
-var modetext =["GMT","LT","FT","ET"];
-var HR=davtron.getNode("indicated-hour",1);
-var MN=davtron.getNode("indicated-min",1);
-var MODE = 0;
+var m877 = {
+    new : func(prop1){
+        m = { parents : [m877]};
+        m.MODE =0;
+        m.modetext =["GMT","LT","FT","ET"];
+        m.M877 = props.globals.getNode(prop1,1);
+        m.set_hour=m.M877.getNode("set-hour",1);
+        m.set_hour.setBoolValue(0);
+        m.set_min=m.M877.getNode("set-min",1);
+        m.set_min.setBoolValue(0);
+        m.mode=m.M877.getNode("mode",1);
+        m.mode.setIntValue(m.MODE);
+        m.tenths=m.M877.getNode("display-tenths",1);
+        m.tenths.setBoolValue(0);
+        m.modestring=m.M877.getNode("mode-string",1);
+        m.modestring.setValue(m.modetext[m.MODE]);
+        m.HR=m.M877.getNode("indicated-hour",1);
+        m.HR.setIntValue(0);
+        m.MN=m.M877.getNode("indicated-min",1);
+        m.MN.setIntValue(0);
+        m.ET_HR=m.M877.getNode("ET-hr",1);
+        m.ET_HR.setIntValue(0);
+        m.ET_MN=m.M877.getNode("ET-min",1);
+        m.ET_MN.setIntValue(0);
+        m.ET_string=m.M877.getNode("ET-string",1);
+        m.ET_string.setValue("00:00");
+        return m;
+    },
+#### next mode  ####
+    set_clock : func(){
+        var cmode = me.mode.getValue();
+        cmode +=1;
+        if(cmode>3)cmode -=4;
+        me.mode.setValue(cmode);
+    },
+#### elapsed time  ####
+    update_ET : func(){
+        var fmeter = getprop("/instrumentation/clock/m877/ET-sec");
+        var fhour = fmeter/3600;
+        var inthour =int(fhour);
+        me.ET_HR.setValue(inthour);
+        var fmin = (fhour - inthour);
+        if(me.tenths.getBoolValue()){
+            fmin *=100;
+        }else{
+            fmin *=60;
+        }
+        me.ET_MN.setValue(fmin);
+        var str = sprintf("%02.0f:%02.0f",inthour,fmin);
+        me.ET_string.setValue(str);
+    },
+#### update clock  ####
+    update_clock : func{
+        me.update_ET();
+        var cm = me.mode.getValue();
+        if(cm ==0){
+            me.HR.setValue(getprop("/instrumentation/clock/indicated-hour"));
+            me.MN.setValue(getprop("/instrumentation/clock/indicated-min"));
+        }elsif(cm == 1) {
+            me.HR.setValue(getprop("/instrumentation/clock/local-hour"));
+            me.MN.setValue(getprop("/instrumentation/clock/indicated-min"));
+        }elsif(cm == 2) {
+            var FTH = getprop("instrumentation/clock/flight-meter-sec");
+            if(FTH != nil){
+                me.HR.setValue(getprop("instrumentation/clock/flight-meter-hour"));
+                me.MN.setValue(getprop("instrumentation/clock/flight-meter-min"));
+            }
+        }elsif(cm == 3) {
+            var ETH = me.ET_HR.getValue();
+            if(ETH != nil){
+                me.HR.setValue(me.ET_HR.getValue());
+                me.MN.setValue(me.ET_MN.getValue());
+            }
+        }
+    },
+};
+
+
+var davtron=m877.new("instrumentation/clock/m877");
+var ETmeter = aircraft.timer.new("/instrumentation/clock/m877/ET-sec", 10);
+
+##################################
 
 setlistener("/sim/signals/fdm-initialized", func {
-    set_hour.setBoolValue(0);
-    set_min.setBoolValue(0);
-    mode.setIntValue(MODE);
-    modestring.setValue(modetext[MODE]);
-    HR.setIntValue(0);
-    MN.setIntValue(0);
+    ETmeter.reset();
+    settimer(update,2);
     print("Chronometer ... Check");
-    settimer(update_clock,2);
 });
 
-setlistener("/instrumentation/clock/m877/mode", func(md) {
-    MODE = md.getValue();
-    modestring.setValue(modetext[MODE]);
+setlistener("/gear/gear[1]/wow", func(gr){
+    if(gr.getBoolValue()){
+        ETmeter.stop();
+    }else{
+        ETmeter.start();
+    }
 },0,0);
 
-var update_clock = func{
-    var FThr =getprop("/instrumentation/clock/flight-meter-hour");
-    
-    var FM =0;
-    if (MODE == 0) {
-    setprop("/instrumentation/clock/m877/indicated-hour",getprop("/instrumentation/clock/indicated-hour"));
-    setprop("/instrumentation/clock/m877/indicated-min",getprop("/instrumentation/clock/indicated-min"));
-    }
-
-    if (MODE == 1) {
-    setprop("/instrumentation/clock/m877/indicated-hour",getprop("/instrumentation/clock/local-hour"));
-    setprop("/instrumentation/clock/m877/indicated-min",getprop("/instrumentation/clock/indicated-min"));
-    }
-
-    if (MODE == 2) {
-    setprop("/instrumentation/clock/m877/indicated-hour",FThr);
-    FH = getprop("/instrumentation/clock/m877/indicated-hour");
-    FM = FThr - FH;
-    FM = FM * 60;
-    setprop("/instrumentation/clock/m877/indicated-min",FM);
-    }
-
-    if (MODE == 3) {
-    var ETH = getprop("/instrumentation/clock/ET-hr");
-    if(ETH != nil){
-        setprop("/instrumentation/clock/m877/indicated-hour",getprop("/instrumentation/clock/ET-hr"));
-        setprop("/instrumentation/clock/m877/indicated-min",getprop("/instrumentation/clock/ET-min"));
-        }
-    }
-
-settimer(update_clock,0);
+var update = func{
+davtron.update_clock();
+settimer(update,1);
 }
\ No newline at end of file
diff --git a/Aircraft/Instruments-3d/clock/M877/M877.png b/Aircraft/Instruments-3d/clock/M877/M877.png
new file mode 100644
index 000000000..fadf01b15
Binary files /dev/null and b/Aircraft/Instruments-3d/clock/M877/M877.png differ
diff --git a/Aircraft/Instruments-3d/clock/M877/m877-hotspots.xml b/Aircraft/Instruments-3d/clock/M877/m877-hotspots.xml
deleted file mode 100644
index e332f44eb..000000000
--- a/Aircraft/Instruments-3d/clock/M877/m877-hotspots.xml
+++ /dev/null
@@ -1,67 +0,0 @@
-<?xml version="1.0"?>
-<!--Davtron M877 Chronometer-->
-
-<PropertyList>
-
-    <name>M877 hotspots</name>
-    <w-base>60</w-base>
-    <h-base>60</h-base>
-    <w>60</w>
-    <h>60</h>
-
-    <layers>
-    </layers>
-
-    <actions>
-<!--
-        <action>
-            <name>outline</name>
-            <button>0</button>
-            <x>-30</x>
-            <y>-30</y>
-            <w>60</w>
-            <h>60</h>
-        </action>
--->
-        <action>
-            <name>mode increment</name>
-            <button>0</button>
-            <x>-18</x>
-            <y>-20</y>
-            <w>12</w>
-            <h>8</h>
-            <binding>
-                <command>property-adjust</command>
-                <property>instrumentation/clock/m877/mode</property>
-                <step>1</step>
-                <min>0</min>
-                <max>4</max>
-                <wrap>true</wrap>
-            </binding>
-        </action>
-
-        <action>
-            <name>set time</name>
-            <button>0</button>
-            <x>-5</x>
-            <y>-20</y>
-            <w>9</w>
-            <h>8</h>
-            <binding>
-            </binding>
-        </action>
-
-        <action>
-            <name>increment time</name>
-            <button>0</button>
-            <x>5</x>
-            <y>-20</y>
-            <w>12</w>
-            <h>8</h>
-            <binding>
-            </binding>
-        </action>
-
-    </actions>
-
-</PropertyList>
\ No newline at end of file
diff --git a/Aircraft/Instruments-3d/clock/M877/m877.ac b/Aircraft/Instruments-3d/clock/M877/m877.ac
index 21aae95e3..164e1d3f3 100644
--- a/Aircraft/Instruments-3d/clock/M877/m877.ac
+++ b/Aircraft/Instruments-3d/clock/M877/m877.ac
@@ -10,8 +10,8 @@ name "CTL.btn"
 kids 2
 OBJECT poly
 name "CTL.btn_0"
-data 8
-Cube.118
+data 4
+Cube
 crease 30.000000
 numvert 8
 0.002006 -0.012743 -0.016302
@@ -26,37 +26,37 @@ numsurf 4
 SURF 0x00
 mat 1
 refs 4
-0 0.753019213676 0.490330994129
-4 0.753019213676 0.490330904722
-5 0.753019094467 0.398960709572
-1 0.753019213676 0.398960709572
+0 0.751193165779 0.486213296652
+4 0.751193165779 0.486213296652
+5 0.751193165779 0.402652829885
+1 0.751193165779 0.402652829885
 SURF 0x00
 mat 1
 refs 4
-1 0.753019213676 0.398960709572
-5 0.753019094467 0.398960709572
-6 0.662776589394 0.398960769176
-2 0.662776589394 0.398960709572
+1 0.751193165779 0.402652829885
+5 0.751193165779 0.402652829885
+6 0.664250850677 0.402652829885
+2 0.664250850677 0.402652829885
 SURF 0x00
 mat 1
 refs 4
-2 0.662776589394 0.398960709572
-6 0.662776589394 0.398960769176
-7 0.662776589394 0.490330994129
-3 0.662776589394 0.490330994129
+2 0.664250850677 0.402652829885
+6 0.664250850677 0.402652829885
+7 0.664250850677 0.486213296652
+3 0.664250850677 0.486213296652
 SURF 0x00
 mat 1
 refs 4
-4 0.753019213676 0.490330904722
-0 0.753019213676 0.490330994129
-3 0.662776589394 0.490330994129
-7 0.662776589394 0.490330994129
+4 0.751193165779 0.486213296652
+0 0.751193165779 0.486213296652
+3 0.664250850677 0.486213296652
+7 0.664250850677 0.486213296652
 kids 0
 OBJECT poly
 name "CTL.btn_1"
-data 8
-Cube.118
-texture "M877.rgb"
+data 4
+Cube
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -68,16 +68,16 @@ numsurf 1
 SURF 0x00
 mat 1
 refs 4
-0 0.753019213676 0.490330904722
-3 0.662776589394 0.490330994129
-2 0.662776589394 0.398960769176
-1 0.753019094467 0.398960709572
+0 0.751193165779 0.486213296652
+3 0.664250850677 0.486213296652
+2 0.664250850677 0.402652829885
+1 0.751193165779 0.402652829885
 kids 0
 OBJECT poly
 name "HR.001"
 data 9
 Plane.472
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -98,7 +98,7 @@ OBJECT poly
 name "HR.002"
 data 9
 Plane.477
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -119,7 +119,7 @@ OBJECT poly
 name "M877"
 data 10
 Circle.050
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 102
@@ -798,7 +798,7 @@ OBJECT poly
 name "M877.002"
 data 10
 Circle.054
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 32
@@ -952,7 +952,7 @@ OBJECT poly
 name "M877.display"
 data 9
 Plane.469
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 8
@@ -984,7 +984,7 @@ OBJECT poly
 name "MN.001"
 data 9
 Plane.479
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1005,7 +1005,7 @@ OBJECT poly
 name "MN.002"
 data 9
 Plane.478
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1028,7 +1028,7 @@ kids 2
 OBJECT poly
 name "SEL.btn_0"
 data 8
-Cube.111
+Cube.001
 crease 30.000000
 numvert 8
 0.002006 -0.012743 0.006863
@@ -1043,37 +1043,37 @@ numsurf 4
 SURF 0x00
 mat 1
 refs 4
-0 0.753685772419 0.799804747105
-4 0.753685772419 0.7998046875
-5 0.753685712814 0.704666018486
-1 0.753685772419 0.704666018486
+0 0.75237852335 0.796478271484
+4 0.75237852335 0.796478271484
+5 0.75237852335 0.708643317223
+1 0.75237852335 0.708643317223
 SURF 0x00
 mat 1
 refs 4
-1 0.753685772419 0.704666018486
-5 0.753685712814 0.704666018486
-6 0.661955595016 0.704666078091
-2 0.661955595016 0.704666018486
+1 0.75237852335 0.708643317223
+5 0.75237852335 0.708643317223
+6 0.66299623251 0.708643317223
+2 0.66299623251 0.708643317223
 SURF 0x00
 mat 1
 refs 4
-2 0.661955595016 0.704666018486
-6 0.661955595016 0.704666078091
-7 0.661955595016 0.799804747105
-3 0.661955595016 0.799804747105
+2 0.66299623251 0.708643317223
+6 0.66299623251 0.708643317223
+7 0.66299623251 0.796478271484
+3 0.66299623251 0.796478271484
 SURF 0x00
 mat 1
 refs 4
-4 0.753685772419 0.7998046875
-0 0.753685772419 0.799804747105
-3 0.661955595016 0.799804747105
-7 0.661955595016 0.799804747105
+4 0.75237852335 0.796478271484
+0 0.75237852335 0.796478271484
+3 0.66299623251 0.796478271484
+7 0.66299623251 0.796478271484
 kids 0
 OBJECT poly
 name "SEL.btn_1"
 data 8
-Cube.111
-texture "M877.rgb"
+Cube.001
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1085,16 +1085,16 @@ numsurf 1
 SURF 0x00
 mat 1
 refs 4
-0 0.753685772419 0.7998046875
-3 0.661955595016 0.799804747105
-2 0.661955595016 0.704666078091
-1 0.753685712814 0.704666018486
+0 0.75237852335 0.796478271484
+3 0.66299623251 0.796478271484
+2 0.66299623251 0.708643317223
+1 0.75237852335 0.708643317223
 kids 0
 OBJECT poly
 name "et"
 data 9
 Plane.485
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1115,7 +1115,7 @@ OBJECT poly
 name "ft"
 data 9
 Plane.484
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1136,7 +1136,7 @@ OBJECT poly
 name "gmt"
 data 9
 Plane.482
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
@@ -1157,7 +1157,7 @@ OBJECT poly
 name "lt"
 data 9
 Plane.483
-texture "M877.rgb"
+texture "M877.png"
 texrep 1 1
 crease 30.000000
 numvert 4
diff --git a/Aircraft/Instruments-3d/clock/M877/m877.xml b/Aircraft/Instruments-3d/clock/M877/m877.xml
index 8d95dc898..c050c1336 100644
--- a/Aircraft/Instruments-3d/clock/M877/m877.xml
+++ b/Aircraft/Instruments-3d/clock/M877/m877.xml
@@ -99,4 +99,20 @@
     </axis>
 </animation>
 
+<!-- -hotspots -->
+
+<animation>
+    <type>pick</type>
+    <object-name>CTL.btn</object-name>
+    <action>
+        <button>0</button>
+        <repeatable>false</repeatable>
+        <binding>
+                 <command>nasal</command>
+                <script>m877.davtron.set_clock();</script>
+       </binding>
+    </action>
+</animation>
+
+
 </PropertyList>
\ No newline at end of file
diff --git a/Aircraft/Instruments-3d/clock/M877/note.txt b/Aircraft/Instruments-3d/clock/M877/note.txt
new file mode 100644
index 000000000..dda6943af
--- /dev/null
+++ b/Aircraft/Instruments-3d/clock/M877/note.txt
@@ -0,0 +1,6 @@
+The M877.nas must be loaded in the set file like this ...
+<nasal>
+    <m877>
+        <file>Aircraft/Instruments-3d/clock/m877/M877.nas</file>
+    </m877>
+</nasal>
\ No newline at end of file