Its About Time has dated this piece to the 1960s.

This watch can be inspected by any omega expert. It has already had a new mainspring fitted by Simon Freese who was very impressed with it. If you would like any further pictures just email your request. If you would like to view, please call to arrange a visit. A very rare watch and one for the Speedmaster collector. We will supply a new original omega bezel with the watch should you want to 'smarten' it up.
Its About Time has dated this piece to the 1960s.
Antique clock and watch shop specialist (featured on salvage hunters the restorers) with select fine furniture.
You can view the stock and full dealer information on the Its About Time Profile Page