It's Speedy Tuesday! Today we feature one of the most popular vintage Speedmaster watches with a caliber 321 movement: The Speedmaster Pro reference 145.012. We have featured this specific reference number many times before here, as it was one of the watches that was worn by an Apollo 11 crew member in 1969. Also, as it is one of the most common caliber 321 Speedmaster models, it means you are able to source one without too many problems (and money). Click to read all about this Speedmaster Pro 145.012-67 from the pre-Moon era!