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Discussion Starter #1 (Edited)
Does anyone have any info on these movements?
One guy says that these are Bulova-made movements, made in their Swiss factory in the early 1920's. I agree with the date as being pre-April 1923, but I wonder if they use some other manufacturer's ebauche? I can't find a match at all on Roland's site using the advanced setting, maybe someone has a match.
(BTW, the triangle stamp in no.1's balance well is not a date mark!)
Thanks, Bob.

Number 1.
Hairspring stud for no.1.




Keyless works for no.1.








Number 2.

 

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I'm sorry that you are't getting any replies. I wish I could help but alas, my resources are only as good as yours (or even worse.....). All I can say is that the positioning of the gears shows that it isn't two bridge versions of the same movement. The two are entirely independent of each other.

Hartmut Richter
 

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Discussion Starter #3

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although "Bulova W.Co." rather than "Bulova Watch Co." name "likely" predates 1923, i do not think that can be 100% certain, possible exceptions may exist? The triangle mark for 1926 looks exactly that - 1926?

not sure but the second watch may have a mark after the serial number.

do the inside cases have and names in them?

just my 2 cents.
A
 

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There is some talk that Bulova used some early Gruen movements?

http://www.mybulova.com/forums/very-early-bulova-watch-co-movement
Hi Barry
By Gruen, do we mean Aegler as the last poster implies from your link?
Because that movement is surely not an Aegler or Rebberg movement.

More like Fontainemellon?
adam
 

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Don't think these had any connection to Aegler at all, haven't seen any reference for their 10-12 size pocket watch movements besides what they manufacture mostly for wristwatches in the 1900-1920s. Gruen SemiThin Movement 740 has most resemblance to the bottom 5 adjustment one. If you conjoined the fourth bridge to the center bridge for the Gruen 740 and shaved the bridge down a bit you could have almost a perfect match. Here is a Gruen 740:

59b8_1.JPG

The Bulova Hi-Thin movements are certainly mysteries. I've came across a few throughout the years and have owned one several years ago. They might be the first pocket watch movements to be labeled Bulova so it pre-dates any dating nomenclature. To me they look like attempts to enter the market with standard quality ebauches and putting higher adjustments so that they will run good, especially for the American market. This looks to pre-date 1920s a bit and at that time American market was still mostly dominated by 16-18 size watches, whereas this is between 10-12 size. Here is an example I used to own:

bb1.JPG
 

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OK
As I said not Aegler.
and I don't think Gruen either, sorry Ben.
 

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OK
As I said not Aegler.
and I don't think Gruen either, sorry Ben.
I mostly agree but we can't say for sure, especially the fact that during the time period there were hundreds of ebauche makers who did not label their movements due to customer demand. You could see if the Gruen 740 or any of their SemiThin models were altered a bit they could become something like the Bulova. Gruen had an impressive lineup of 10-12 size watches, they had the manufacturing capability but it doesn't mean they needed or wanted business from Bulova. However, they certainly did make the base caliber for other brands, especially their partner Alpina. So we can't rule anything out, but I'd say unlikely.
 

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Ok.
 

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Discussion Starter #12
Thank you all for comments, very insightful.
As I originally said, these are thought to be ebauches of Bulova's own making and it seems this could be so.
The watch with the triangle pre-dates the usual method used for dating Bulova movements, as first noted in post #1.
Regards, Bob.
 

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Thank you all for comments, very insightful.
As I originally said, these are thought to be ebauches of Bulova's own making and it seems this could be so.
The watch with the triangle pre-dates the usual method used for dating Bulova movements, as first noted in post #1.
Regards, Bob.
Sorry thats not the way I read it!

First Post
One guy says that these are Bulova-made movements, made in their Swiss factory in the early 1920's. I agree with the date as being pre-April 1923, but I wonder if they use some other manufacturer's ebauche?
Thanks, Bob.
B
 

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Discussion Starter #14
You mean, not like I said in the first sentence?
I raised the possibility of the ebauche being by another manufacturer, that is all.

The guy I mention in the first sentence happens to be a Bulova trained watchmaker and repairman, not a general tinker but a specialist and very Bulova centred. He is a co-panel member at myBulova.
Sorry for not making it clearer.
 

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I currently own a Bulova pocket watch with a Le Phare movement and during my search for information found that they also sourced movements from Venus , ETA and A. Michel. Hopefully this of some help.
 

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Discussion Starter #17 (Edited)
Other ebauches that Bulova have used include those of;
P. Droz, Favre, FHF, Fleurier, A. Schild, Aurore-Villeret, Felsa, Glycine, Unitas, Liengme, Valjoux, Sonceboz, Peseux, Recta, Frey,Junghans, Tissot and Etienne, as well as those already mentioned.

There may be others, but these are what I have personally seen used in Bulova watches, apart from their own.
They certainly used some great manufacturers movements in their watches!

Bob.


Here is another one with a Cattin Aubry movement. Nothing on Mikrolisk for both names together, but Aubry freres are the makers of Doxa, and Cattinand cie are Swiss registered (no date).

IMG_20141018_111433.jpg .

I currently own a Bulova pocket watch with a Le Phare movement and during my search for information found that they also sourced movements from Venus , ETA and A. Michel. Hopefully this of some help.
 
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