Speedmaster Professional Moonwatch

“Speedmaster Professional (first)”

Reference 105.012 is the first asymmetric-cased Speedmaster Professional, a calibre 321 Moonwatch-era reference produced from 1963 to 1966. Its stepped black applied-logo dial, short/fat pushers, DON tachymeter bezel, and “Professional” dial text make it the hinge between the straight-lug…

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