Yes, the Cyma/Tavannes movement is pretty advanced for the time, and yes, it is funny how little protection was seen as a requirement for watches that were basically going on the frontlines. The Cyma WWW is pretty impressive as well. I have a few Cymas in the collection, and all of them are very handsome.
I am an AS fanboy though - anything they make seems to be incredibly reliable for me, and long may they stay that way.
The prices are slowly increasing, similar with CWC G10s. I think they might plateau though, despite the limited availability as the ultra-desirable pieces are the 6B/159s (Weems and non-Weems versions) and the WWW. These will always be the unappreciated workhorses who did the heavy lifting; it’s why I prefer them to the WWW.
I am partial to a pre-1955 Enicar (avoid later models as (a) I’m not made of money, and (b) too many franken-Enicars on the market). I quite like their ATP as it’s full stainless steel rather than plate, and it’s one of those with the thinner, stencil-style numerals, which I prefer. The AS 984 is a solid movement, but I know I overpaid for this considering the sum of its parts (but then again, it was less than going market rate for an Enicar ATP at the time). I have a 1940s Waterproof watch with the same movement I picked up about a week before for about 1/7th of the price, ATP-inspired not issued, and it’s equally handsome. To be brutally honest, it’s one of about 20 of this style I own so it barely gets any wrist time; it’s fair to say I have a type.
If you want another OG field watch, I’m still wearing in my A408 at the moment. This was a dirt cheap, very lucky find. You are in my zone right about now. My default is 40s-50s field/military-inspired Swiss jobbers.