i think i did a post on it last year, but to make it quick, Jenny did all the design and patent stuff in 63, but had no production facilities so O&W made them for Jenny, themselves and Philip as they had the facility to make them. its a monocoque case and you flip off bezel, unscrew retaining ring amd very thick plexi comes off. can be changed in 10 minutes if you have the right tool, which i dont have.
movement obviously comes out of the front.
dual time bezel as well.
very few O&W's around i'm pleased to say :)
1000m was a bit of a step up from most dive watches of the time.
G
