You don’t see these too often, and this is the first of its kind in this workshop. As it’s a nice chronograph, you will already have guessed that it belongs to Anders from Norway 😉
The watch doesn’t work, and it feels like the mainspring is broken.
The EP 4-68 movement in all its glory. It has Inca shock protection on the balance, which is nice to have, and has a very smooth reset mechanism.
The bottom plate. The winding/setting mechanism resembles that of some pocket watches, with the see-saw that either engages with the barrel wheel or with the intermediate setting wheel.
Last look before I take the movement apart.
Nice cote de Geneve decoration on the bridges. Note the construction of the fourth wheel with its driving wheel for the chronograph. On most movements, the driving wheel has to be pulled off. Here, the fourth wheel and driving wheel are held by a cock of its own, which means that they don’t have to be pulled apart.
And here it is with the cock removed and taken out of the movement. I like this construction very much!
With the barrel removed, you can see the winding mechanism.
As suspected, the mainspring is broken.
Looks like it was about time for a service 😉
Fresh out of the cleaning machine, and waiting for a new mainspring.
The pushers are rusted through, and will need replacing.
New pushers fitted.
I managed to find a mainspring that is close enough – a 1.25 x .115 x 360 x 10.5 T-End.
Time to put the movement back together.
The winding mechanism goes in, so that I can wind the movement for testing.
The base movement is back together – let’s see how it performs…
Looks like I got the mainspring right. I chose one that was quite a lot thinner than the one that was fitted.
Now I can start on the chronograph.
Almost back together.
Anders found two dials, and I chose the middle one, as the original hands will fit. The one on the left has smaller sub-dial, which means that I would have to shorten the sub-dial hands.
That looks rather nice! Look a the font of the numbers – you got to love the 4 and the 7!
The movement cased.
Ready to go back to Norway.