What’s on your watchmaker's bench today?

166.0134 is your reference number, no more specific details than that (Omega had various configurations for each!).

That movement definitely seems like it has seen better days/needs some love, so good luck with it! Also, ditch that bracelet, those stretch bracelets are well-known to damage lugs.

As Erich noted, 166.0134 is the reference for case parts, this example from Boley.

https://boley.de/en/case-parts/omega/5394.166-0134

And fro Emmywatch.

https://www.emmywatch.com/db/movement/omega--166_0134/

And for parts for caliber 1012 if you need any, Emmywatch has listings, also parts documents.

https://www.emmywatch.com/db/movement/omega--1012/

FHF 909 before cleaning:

This is what happens when a retailer sells a mechanical (auto wind) Seiko to someone who only knows about quartz watches. The owner states there is something drastically wrong with a watch that he only wears about 3 hours a day, and he winds it manually about 3 turns of the crown to assure it doesn’t run down. The watch came to me with two pages outlining all the details of the erratic performance. Plus, he claims the calendar didn’t change one day! I told him that was because he had set the watch 12-hours out, and the calendar changed at NOON, and he didn’t notice. I mentioned this to him, and he told me that was NOT possible. This from someone who told me he is technically very knowledgeable! And that I didn’t know what I was talking about! And he told me that the power reserve was at most, 12-hours!

Admittedly, the watch showed a loss on my timing machine, and a loss of about 30 seconds on my wrist in 18-hours. I’ll adjust that. He mentioned the very much better performance of watches owned by his friends, and he expects that performance out of his Seiko. There’s no cure for stupid, but I’m gonna try! This will go back to him with a detailed report of the performance during the 3 days I wear it.

How did this one turn out Doug?

I spoke to them three days ago. He hadn’t come back for the watch at that time. I spoke to the owner of the watch, the day the watch came to me. The owner of the watch explained that the calendar didn’t change, one day. I told him that the watch likely had stopped (run down), and he set it 12 hours out, and the calendar changed at noon! He told me I didn’t know what I’m talking about! I told him the watch should run well over 40 hours on a full wind. He told me (again) that I didn't know what I was talking about, and that the longest it had run was 12 hours! I wrote the p _ _ _ k a letter about his watch. By actual test, from fully wound, the watch runs 57 hours! I’d like to be a fly on the wall the day he reads the letter I wrote!

The store offered to send the watch to Seiko (? Seiko Canada closed?) to have it checked out. Cost to the customer to be $50.00 return postage. The customer declined. The only thing that’s wrong is something in the owner’s head, and Seiko can’t fix that! He has the letter I wrote, and the answers to his problem are all included in the letter. He bought it at a discount, and the retailer won’t take it back, and why should she. So if he really wants satisfaction, it is up to him. Some people!