Let’s see the inside, please. The backs should unscrew.
I doubt the Waltham is an 8 day watch. The are both General Service Temporary Pattern or Time Piece(depending on who you ask). They were used for artillery, comparing etc. They’re not particularly rare but, the Canadianicon marked ones I think are a little harder to find. Interesting watches and the American companies seamed to have made a lot of them for the Commonwealth. I’ve also noticed they seamed to have made a lot of them with black dials.
Try to find a copy of this book, it has quite a few of these pocket watches in it.