Unknown Bulova date code

Hi Jim, that is not a date code but probably something to do with the movement number. Can you see what is inside the trapezium, letters or numbers? A little hard to tell in the pic.

Got any more pics, as this looks like early 1920's.

Looks like a stylized "P", as done with a calligraphy pen.

The hallmark is not Datecode that We're currently aware of - however, the Movement is also absent of any model identification on the bridge which, in My belief, is now an indcation of a Movement manufactured pre-1920.

My most recent observations will be published in this thread http://www.mybulova.com/node/4987 within the next Hour.

Thank you FifthAvenue, it looks as if our watches are very similar. The space where yours says Rubiat is worn off on mine but i believe it is the same model. Here is a shot of the inside back for comparison. (The reason I'm doing research is that I'm planning to sell it on eBay this week and I want to give an accurate description)

Jim,

We know this much to Date:

The American Standard 'Globe' hallmark on the inner Caseback of Your Watch was patented by J. Bulova in 1918.

The linked Watch above is Dated by inscription on the Caseback - 1919.

A manufacture Date for Your watch of 1918 - 1920 is as close as We can get at this time. 

Similar to our ubiquitous FHF Robert, or the AS 340:

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&AS_340

Thank you Fifth Avenue for your input. Very interesting. Regards, Jim

Jeff's 1922 Lady Maxim has the same trapezoid mark in the same place.