Nice find. I do not know the xtal number, but I bought (& sold) 1 of these some years ago myself (pre-1950 was not generally really my cup of tea either). The watch dates from about 1940 and looks to be all original. It is powered by a 17-jewel, hand-wound movement and your dial appears to be unrestored. These watches were made for the Canadian market with dials typically made locally (in Canada) so as to lower import duty. If memory serves me, it should be 31mm wide, excluding the winding crown. On the inside of the caseback, it should be signed Rolex, Keystone Victory and have a case reference number.
In really good condition (obviously with the xtal replaced & the movement in good, running condition), it is worth around a grand or so