paulfromcamden
Baffled
Doesn't look like it has the right strap (the gap would irritate me). Expect to pay £200 for one.
The strap is the wrong size but I'm not sure that should affect the purchase. The original leather strap will have long ago perished and it's easy enough to replace. Leather straps aren't necessarily expensive and there are obviously lots of metal bracelets that would also work.
I'd be more concerned about whether the case has been polished and any crispness lost as this is a really common thing for dealers to do to make the watch look more 'shiny' but it affects the value to collectors.
I'd also really want to know when it was last serviced. If there's no mention of a service in a listing I'd assume I need to factor in the cost of a service to the purchase price. Fifty year old watches need some TLC.