Looking for a Speedmaster with Date

Posts
18,201
Likes
27,508
It’s an early precursor to the 3303. The production Broad Arrows were chronometer certified so the 145.0022 case number became 178.0022. They chose to not keep the exact same dial layout as the Moonwatch, perhaps wisely since it would dilute the Moon marketing message and also since the BA were pitched as a more expensive up market alternative, like the 9300s are now.
I thought all broad arrows where 44.5mm