Just finished getting this watch running. Unlike the other Walthams, I can find no serial number. It appears that the movement is SGT 140-1A E4, but I have no idea who might have made that movement. Since it is 17j, I guess that means no older than 1950s (?), but since it says incabloc on the dial, that implies no newer than 1970s? Of course, that assumes the dial is original. It is in excellent shape, as is the movement. Any ideas Thanks, Hank Waltham?