Looks like a triangle on the movement - maybe 1945? I believe that this is an Ambassador. The lug width is 12-13 mm. I know that watches were smaller in the early years. To me the case is clearly a mens watch but the narrow lug width makes the strap look more like a ladies.
There were no marking on the inside of the case. The picture is not good (in fact, none are that good) but i included it.
Looking forward to your comments.