waltham

Courtesy photo from Geneva Watch Repair - Waltham pocket watch service

Hi - New to this site and these forums. I was wondering if anybody could help me date this Waltham 17 Jewels. It doesn't say "Swiss Made" on the back. Also, it does say "waterproof." I have no idea but the lack of Swiss made makes me think pre-1960. I'm probably way off. Any help would be...