Leaderboard

So after all the fuss with the other clock and having to send it back because it didn't work. The seller refused to give me a full refund so I put it in the hands of Ebay and in the end my full refund was received. So have now bought his little number its French 8day movement striking half hour and hours on a bell by means of a count wheel. Ther is a little damage but looking at it face on you cant see anything. I really like the colour of this and it will fit in my sitting room lovely. I hope I have better luck then the last time.

Using a replacement wheel was good advice. I had one left over from a year ago when I last attempted to repair this watch. When I swapped in that wheel, the gear train ran smoothly. BUT...when I then replaced the pallet, the watch would not run (as I gently wagged the pallet as the roller jewel would). I could not see a definite defect on the pallet stones, but when I replaced that pallet, the watch worked. In a few days I'll be able to post a photo of the presumably bad pallet to get your assessment. I notice that there is more shellac at the base of the exit stone than the entrance one. I wonder if that pushed the jewel too deep into the escape wheel. So now the remaining task is to replace the balance. I see that the impulse jewel is missing from its roller table. <sigh>. (Remember what I said about COMPLETE diagnoses?). I have a replacement roller table with jewel. I've never done this before, but I've read about it. I'm going to carefully use my staking tool to remove the old one (without the impulse jewel) and then replace it. I do have a question, however. It seems that the balance wheel and arbor should not have the hairspring attached during this process. To remove the collet, it seems safer to first remove the stud from the balance wheel cock. I'm hesitant to introduce more opportunities for error, but this seems necessary. Am I right in this regard? I'm eager to repair this watch because it was my late (and dearly loved) father-in-law's, and it will become an heirloom for one of my sons. Bob12, the link you posted is impressive, but beyond my current tools, and more importantly, beyond my current skill. Sent from my iPad using Tapatalk

The Tissot 871/872 & 873 have the save ref number for the balance so I would guess they are the same so 871-1 would also be the same. I have attached the PDF of the Tissot 871 Tissot 871.pdf

Impressed! Following...

I second all that, plus be careful not to press down the back plate too much or the pivots will break easily. Finding a battered watch with working movement is the common solution, but the 7t34 is a rare bird nowadays, at a fair price...

I'd agree with that - there are a number of suppliers in the US who stock Elgin pocket watch parts so, with a bit of luck and perseverance, you should be able to obtain a fourth wheel. Cheers, Will

Very impressed with this project! Great job Michael! Keep us up to date! Cheers, Bob

Well done, looks like good work to me. Cheers, Vic

Very impressive , great work