- 0
-
Recently Browsing
No registered users viewing this page.
-
Topics
-
Posts
-
Hi, Looking at the Bestfits catalogue, it seems it is a LAPANOUSE movement. Which one, it’s hard to say as atleast 2 of them are very similar on Pages 155 and 156. The Ligne size is 13’’’ -13.5’’’ when measured on my movement. Upper plate and bottom plate sizes have a 0.5 ligne difference. The catalogue has some 13’’’ ligne listed but the parts don’t match. However, the two which do match are ligne sizes 10.5 and 12 respectively. I guess as Joe and yourself suggested and to move this forward, it’s easier to measure the mainspring’s H x W x L and then see what’s available on Cousins. Thanks for all your help guys. 🙂 Regards, Yasser.
-
@watchweasol, Dr. Ranfft's site is a great reference. Have you used the advanced search feature to identify movements? And Cousins is great resource for documents. I should have been more specific in my request. I'm looking for the assembly document. I know it exists because I found a link to it on the AWCI site, but membership is required to retrieve it. Alas, I'm not a member. It's a Tissot document; therefore, AWCI had to get it from somewhere. Thank you for your suggestions, Doug
-
@MrRoundel and @HectorLooi, A combination of your suggestions solved the problem: the stem moves smoothly through three positions. Thank you very much for your help. Doug
-
It's good that you're panicking Early because the technical communications are still there. Like for instance 30 seconds ago I just downloaded from this link As you are using an example of 7750 PDF.They just don't jump off the website like they used to you have to stare at the website and then go all I know what I'm supposed to do and then you'll get there and you can get your technical communication but don't worry at some point in time they will all be gone. I doubt there's anything they could do to cousins other than just not give them anything new not that they probably give them anything at all anyway. https://shopb2b.eta.ch/catalog/product/view/id/69714/s/7750-7750-5/category/24/ The access the soon or someday to be forbidden knowledge under penalty of death Start at this link https://shopb2b.eta.ch/ Get confused okay maybe that's just me. Notice how the top of the page it specifies mechanical or quartz pick whichever one you like and then go from there. Then under each of those categories you can pick whatever you want view all will work. Then you get the images of all the various movements that are left that we can look at click on those and it looks like 2019 is the age of all the technical bulletins.
-
By MechanicMike · Posted
Lol glad to be of help for a change! Yeah I love my desk that's for sure.
-
Question
JohnC 56
Hi all,
I have an old Bulova that has been on and off my workbench for a few months now - it was one of the first watches I attempted to service. The original staff was bad, so I ordered another movement of the same caliber (8AH, or ETA 1000) in the hope of transferring the balance complete. After receiving the parts movement, I then completely fouled up the hairspring on the "new" balance, due to a tragic combination of large overlapping centre wheel and the softness of old Bulova hairsprings (I now never dangle balance wheels from the cock - a harsh lesson learned).
I've just got a staking set, which makes transferring balance springs pretty painless. The solution to my problem seemed obvious - put the old spring on the new balance. I did it, and it's running well with decent amplitude and minimal beat error. The problem is that the watch is running 2 mins slow with the regulator as far to the "fast" position as it can go.
I was aware of the risk here, as I know hairsprings are vibrated to specific balance wheels. However, I thought it wouldn't be a huge problem given that the watches are the same caliber. How wrong I was! My instinct is that the new wheel is too heavy for the old spring, causing the slower frequency. Is there anything relatively painless I can do to address this problem, or am I out of luck, barring getting yet another donor movement? I really just bought this watch for practice, and cosmetically it's a mess. I don't see the point in dumping more money in. Hoping there is a quick fix, but prepared to live with a slow watch a few times a month.
Thanks in advance,
John
Link to post
Share on other sites
19 answers to this question
Recommended Posts