It's one of those old/cheap PAM312 with the A7750 movement, non-decorated. There were similar PAM312 watches but with a much better build quality just judging from the two pictures you posted.
Of course, as to what activity, then I would suggest adding the rules of the sales section to your suggested reading. Since you'd be browsing the sales section anyway to get some idea of a good price for the watch, might as well read the rules so you create your first sales thread correctly.