Thanks for all your answers and comments!
I'm still waiting for the watch to arrive so I'm still excited to finally see the watch with my own eyes (note to self: Never order intercontinental shipments just before the holiday season, the tracking process will drive you crazy)
another newbie question:
is there a way of gaining additional information from the movement and case serial numbers, i.e. a sort of database starter-numbers and their assigned movement/case tpes are listed? I take it the numbering process was not random, even in the 1920s, but then again I reckon it all comes down whether this information has been kept, and subsequently released, by the company (many Swiss companies employ company historians dealing with exactly that these days, but I am not too sure how these things are handled in the US).