This weekends effort.
Train assembled. This caused me a lot of grief, as I needed to replace the seconds pinion - except when I used the new one, the train was very stiff.
It took me a while to discover that for some reason, the jewel was set much more tightly in the movement, than in the donor - even though they were the same movement number. Project train bridge:
Donor - had to press the jewel in further on the project bridge (donor was scuffed up). I think I had the train apart and together 5 or 6 times before I worked it out - it was so unexpected.
Benrus really finished these very nicely.
Running, yet to get the top balance jewels.
Movement done. Benrus did a very nice job of finishing these - much better than many. It is a real pity that Benrus is an under-appreciated brand as workmanship like this shouldn't go to unheeded.
Now for the jump hour mechanism. Parts from the setting, motion works and jump hour mechanisms.
Setting assembled, plus one of the jump springs.
Copper eccentric cam to advance the hour number.
You can see the star on the back of the hour disc, which the bottom jump spring locates in to centre the number on the window. I had to adjust this star about 20 degress to get things lined up properly. Basically, the points should not be on the diagonal of the holes, rather the V needs to be on a diagonal line through the holes.
Hour and minute discs.
Finished - with new strap.
On the wrist. A new crystal is on the way from the US, I will fit it when it turns up. This one is not in great condition with a number of defects - including the crack in the (on a normal watch) 27 minute position.