Unsure of date; there are 3 date codes with triangle: 1926, 1935, and 1945.
Nice package whencehecame . The best way to determine the year by the date code, when there's more than one year represented is to look up the years the particular movement was made in the movement data base on the the site. In this case the 17AH was made between 1945 - 1961. I had to look up dongle. I didn't know the meaning of that word. It's the watch chain. I don't recall ever seeing and ad with the chain included.
In reply to ad is 1946 by FifthAvenueRes…
These pocket watches can be tricky. The subject watch "bezel" and dial/font looks the same to me. The hands match the Buckingham but not the bow. The bow matches the Triumph but the hands to not match the ad. Also the Montgomery seems to match the Bow and bezel but not the font. I think based on the case bow and font I agree with Fifth and this is a Triumph with possible replaced hands or a variant with original hands. We have only one ad confirming this model but it seems to be the best fit to a Triumph.
In reply to These pocket watches can be… by JimDon5822
In reply to These pocket watches can be… by JimDon5822
In looking at the Hands of the black and white 'TRIUMPH' illustration:
The Hour Hand does not match the Minute hand, the Minute Hand being 'Index style' matching the subject Watch. Being that the illustration is just that, an illustration I think the Hand discrepancy can be attributed to artist rendition error.
fwiw