And ready now for many years to come. Thanks for your post!
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It’s a 2447 “yachting” model which were a special order from what I could find. The blue on the right subdial is marked in 5 minute increments which they used when starting sailboat races.
This one is from the 60s it was my uncles and he left it to me when he passed recently.
I really like these old Heuers. This one has a very nice dial!
I’ve looked into those. I’d like to get one eventually.