Looks similar to 1945 Brigadier and 1945 Douglas, but not the same dial and slight difference in the case. The watch band pin holes do not extend through the case to be visible on the outside (like the Brigadier). Movement is seventeen 17 jewels , unadjusted , swiss , with a mark MX(?). the MX (?) looks like the MX is followed by a small square with some marking inside. I cannot make out the mark inside the square.
Not sure about the date, but I think I am close.
Thanks Ken S