Bulova 1920 -Unknown

Model ID rating explained.
Manufacture Year: 
Movement Model: 
Movement Jewels: 
Case Serial No.: 
Case shape: 
Case Manufacturer: 
American Standard
Additional Information: 

2 piece Case measures 27.5mm lug to lug x 19mm non inclusive of the Crown using Calipers.

Unsigned Dial shows Black printed Arabic numerals.

Hour and Minute Hands are Fusaux style.

Movement bridge is Hand signed Bulova, plate is stamped Tissot.

Hinged Caseback is stamped as shown.

Date of manufacture is speculative.



Not For Sale
Bulova watch
1920 Bulova watch
1920 Bulova watch
Bulova Watch advert
bobbee's picture
Posted June 1, 2015 - 10:23am

There are other companies that use case serial numbers that mean different things than just a run of numbers.

Certina use the case serial numbers for movement, case metal type (plate, gold, steel etc.), case style and watches made in that series.

Other manufacturers use similar systems, or variations. 

Such fun.


William Smith's picture
William Smith
Posted June 1, 2015 - 3:33pm

Club 5000Panel Member

Yes several manufactures also include other useful information in their serial numbers, but I bet ya a part of the serial number- some subset or range SN -is also used to assign "runs".  If not, we would see duplicate serial numbers in those companies, and although I have not checked, there's probably no duplicate serial numbers w/i a company.  

I've been thinking all along that Bulova may have conveyed the same information in either their Serial Numbers.  Perhaps also within their internal Bulova product numbers we see in the few Bulova Fair Trade Price Lists which we have.  We just have not figured this out yet.  I often see a one digit difference between a yellow plate vs white plate model variant in price list model numbers, but there could be exceptions too, and I just don't "notice or remember" exceptions to observed "patterns", if you will.

Without these numbers and other data in a relational database, its hard to go fishing for these relationships and be able to say anything. I can do a lot of arm waving, but that's almost all.

Our conversation about early Ladies (1921/23) model numbers (names or variants w/i Lady Maxim) suggest odd numbers at end of "name/variant" for fill models, and even numbers at end for "solid" "model/variant".   

I would not be at all surprised if there's more info in BUlova SN's for cases, similar to first digit relationship to year of manufacture within decade.  Same possibiliy for internal Price List model numbers often being unique to variant w/i model.  

I'm gonna keep guessing and arm waving until some brave soul (with access to the back end and basic SQL) gives us some fishing tackle. 


bobbee's picture
Posted June 1, 2015 - 4:08pm

Back to the headscratching.

My beautiful hair, gone...

William Smith's picture
William Smith
Posted June 1, 2015 - 4:38pm

Club 5000Panel Member

I'm almost bald too, and my arms are tired from "waving".  As much as I insist the numbers were "also used" for manufacturing, those to Am Std case numbers - as evidenced by photos of the cases- sure don't fit my ravings.  If someone said "I remember seeing two watches with these case serial numbers being one unit apart", I could keep my arms going.  But we have the watch records and pictures.

Perhaps it's a fluke, or a mis stamp....Just kidding.  It's obviously not.

bobbee's picture
Posted June 1, 2015 - 5:47pm

Sorry for pointing them out now...

...you rave, I'll rant.

William Smith's picture
William Smith
Posted June 1, 2015 - 6:02pm

Club 5000Panel Member

...are you kidding...this is what we need- since it exists- Evidence to the contrary.