Gruen verithin pocket watch serial numbers

#Gruen verithin pocket watch serial numbers serial numbers#

The two calibers I would like to date and learn more about are the illustrated Verithin 550394 and a watch that has Ultra-thin on the case (I'm wary of case data, but 'cased and timed in US by Gruen Star Case Co' seems reassuring), 106687 on mvmt., illustrated. Gee, I see I should have rotated it - sorry. (Please excuse the unprofessional image, done in haste). These might be a clue to a date range, but I have found no dated examples. I have seen 2 Gruens and own a Hamilton all with the illustrated very characteristic style of numerals on the dial. Where would one find the serial number on the watch, or a cross reference to the calibre? Without it, the above SN reference would seem to be useless. I would like to use the calibre to expand my knowledge of these watches, particularly the approx. I know the Gruen records were destroyed upon closure of the business. They are not consistent with either 6 digit number mentioned here being serial numbers.

#Gruen verithin pocket watch serial numbers serial numbers#

I'm somewhat confused because approximate serial numbers and dates are posted at: Is there any on-line reference for Gruen calibers? I have examined a Verithin belonging to my friend, and examined photos of other movements, all of which bear a 6 digit number on the movement: I assume this is the calibre, which means nothing to me. I'm researching Gruens at present and am considering a purchase tonight. I have been helping a friend identify watches in his collection (I'm a bit bolder about cracking open cases than he) it has been a lot of fun. I very recently became interested in pocket watches of which I own three.