{on front of mvent} Patent {above a little cross shaped sybol, above another H symbol which looks like a backwards and forwards pair of F's if not a fancy H}.
Right on, the reverend is sharing some priceless information.
William I believe the technical jargon You're referring to would be the 'balance wheel' and if I've learned anything from the Watchmakers on site a magnetized or sticky hairspring will cause the symptons You're describing.
*note the production Date of the movement coincides with the first numeral of the Case seriel number.
A very nice Watch.
The fast issue could very well be dried or tacky oil on the hairspring holding a coil or two stuck together. A good cleaning will rectify the problem but if your happy with the preformance, I'd leave it. All too often a good cleaning in an old watch will release the oil and dirt pack around old worn pinions and the watch may stop running alltogether.
I agree about this comment from bourg01.....this can occasionally occur, and it has happened to me. However, the only way to really find out if there are any issues or problems is to break it down, clean it, inspect it, oil it, and re-assemble. What is the possible interchageablity of other Bulova models for this movement? I understand there is a 10AT (round movement) and a 13AT (Coffin-Shape) for this same watch. Do you need to find a FHF Cal. 29 for parts, or will a Bulova 10A parts work? What do you guys think?
In reply to I agree about this comment by stoddrob
My motto, If it isn't broken and your happy, don't fix what already works. If you have issues later than stodrob is 100% correct. Only a full breakout and cleaning will identfy issues with the watch.
As for parts interchange, Hard to say, my part catalogues don't even show the 13AT movement. I doubt very much that 10A parts would work but possibly the 13AR parts would.
The 13AT, 13AL, 13AP, 13AN, 13AB, and 13AC are all FHF 29s. Of course, only the jump hour will have the extra plate with discs, but according to Bestfit, the movts are otherwise interchangeable. With some possible rare exceptions, these are the only movts Bulova used that are this size, 8.75''' x 12'''. So you should be able to scavenge any parts needed from the rest in the list.
While it is true that some watches are literally being held together with dirt and gunk, if left to run in that condition, they will soon suffer serious continued damage. At the NAWCC meeting today, a member had boxes of Marvin watches all NOS, and I told all who were interested that they would require a service also, if they were going to be used. Dried up or dirty movts shouldn't be run for any length of time. Dipping them fully assembled won't help ultimately either, the only thing for them is a proper service. I know it is self serving to suggest getting watches serviced, but it is true, these tiny machines will wear unduly otherwise. It took me three months to destroy an NOS Ermano Aquastar.
(It was before I went to school, and was an important first lesson for me)
Resubmitted for ID review based on new "White Prince" ad. There's no other ad for this Jump case style, and the new ad is within 2 yrs of subject watch date. Maybe they didn't get named the "White Prince" untill Sept 1933- but we have no ad indicationg they were simply called "Jump Hour" in 1932.
I'm good with 1932 White Prince ID.