This is a top loader with a 10BA movement and a sweep seconds hand. The case is almost identical my ‘45 Watertite.
There are 2 versions of the 10BA. One has a sub seconds and the other has a sweep seconds. Both versions use a split or solid stem depending on the model. Differentiation can be made by the presence of the exposed gold tone wheel over the train bridge. The model with that wheel has the sweep seconds. Without the wheel is the sub seconds version. This movement has an X date code indicating a 1943 date.
The hour and minute hands are identical to my ‘45 Watertite except these hands lack the lume. These hands could have been used on multiple models with or without lume as it’s called for. Another possibility is that they are replacement hands that never had the lume applied. My conclusion is that this model did not have lumed hands as this is not a lumed dial. I’m not suggesting lumed hands are only with lumed dials. This dial has a very minimalist look to it so unlumed hands would fit the design.
I would be inclined to say this is some variant of Watertite except I found no version of Watertite that’s completely lacking numbers on the dial. I’ve also searched the member watches for all models using the 10BA movement. None of them have a dial resembling this one. The case is 9/16 or 14mm between the lugs and the crystal is 26mm.
