First time poster here. I wonder whether one of you fine people would be able to authenticate an Atlantic Worldmaster from the attached photos. I've been offered it for £55 but have no idea whether this is a fair price. I've tried google and ebay but I haven't seen anything exactly matching this watch. There are some reference numbers on the back but I'm having trouble identifying whether one is a 5 6 or 8. Any pointers would be appreciated,
Thanks in advance.