Automatic mainspring question

Submitted by Avolub on November 6, 2019 - 1:32am
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Hi,

How is the automatic mainspring build up?
Is the Safety spring just one part (spring slightly smaller then the circumference of the barrel) that alows the mainspring to slip when overwound?

If so is the mainspring then just a normal mainspringspring with a normal (as in hand-wound) bridle?

If've read the Bulova self-winding watch manual but this isn't that clear to me.

Thanks in advance
Regards
 

Bulova Accutron Spaceview.

Submitted by el tel on November 4, 2019 - 12:40pm
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I have been collecting Bulova watches for over ten years and have four Spaceviews . I was under the impression that only watches with a chapter ring were genuine but I note that ones with markings on the crystal are in the data base and Bulova produced crystals with markings.

I am in the UK and note that there are quite a few Spaceviews are appearing on the market without chapter rings and not cheap either. I am guessing these are conversions and individuals appear to be jumping on the bandwagon.

Wanted: Hands for 10AK

Submitted by Deafboy on October 30, 2019 - 9:03pm
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Hi,

I'm looking for a set of Bulova hands for 10AK in the "Index" style (sometimes called "baton"). Ideally purple in color but I'm flexible for the color. The pouch should be something # 63-64 for hour/minute (or #65 for second) PI (or WI, BI, RI, etc) where the "I" stands for index.

 

----Edit: the exact fit would be 7AK PI16----

Michel

1940s Midshipman Vs. Minute Man

Submitted by tshanno on October 25, 2019 - 11:36am

Hi, guys.

For the life of me I can't tell these watches apart.  

Midshipman:

https://www.mybulova.com/watches/1940-midshipman-5903

Minute Man:

https://www.mybulova.com/watches/1940-minute-man-2827

At first I thought it was just the watch face but then I came across this Minute Man example:

https://www.mybulova.com/watches/1941-midshipman-6528

I must be missing something.  These cases look identical to me.

Thanks,

Tom S.

Little confused with this 1948 Treasurer

Submitted by What Does Your… on October 22, 2019 - 4:07pm
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Hey all.

I've had this one in my collection for a while.

Going through my watches and pens debating which to sell and which to keep to cover a personal obligation.

This is a 1948 (serial number 8740132) 14k pink gold filled Treasurer case.  The movement however is a 1947 10BC with 21 jewels and adjusted.

This movement of course has no holes for movement ring screws.  Looking at movement ring I can't see any evidence of marring from screw heads.

The dial is salmon colourd and has gold hands.