1942 by the movt date, stainless steel compressor type case, tension ring and outer bezel compress against the crystal. Front loading case with split stem as usual, this one has a broken sweep pinion bridge that will need to be replaced.
Dial with outer chapter ring and smaller crystal at just 26 mm.
There are several ads showing 'Watertite' and 'Military Watertite' from 1942, I don't know how to paste the links here. All examples show Radium dial but it's hard to say whether there is the tiny seconds chapter ring, it doesn't look like it. Also, the ads we have show the model without the word 'Watertite' for 1942.
I will go with a tentative Watertite. The ads I see for this period show these military style watches without the center second hand for the Watertite models. There were also a variety of other names used for these types of watches. A bit tricky to narrow down, like Geoff states.