Omega Speedmaster Reduced vs Omega Speedmaster Professional

Side-by-side at a glance. Click a watch above to open the full reference page.

	Omega 3510.50	Omega 310.30.42.50.01.002
Model	Speedmaster Reduced	Speedmaster Professional
Caliber	Omega Cal. 3220 -- automatic integrated chronograph, 28,800bph, 44h PR, 37j; column-wheel, vertical clutch; used in reduced-size Speedmaster	Omega Cal. 3861 -- Co-Axial Master Chronometer, manual-wind, 21,600bph, 50h PR, 33j; column-wheel, METAS-certified, anti-magnetic to 15,000 gauss
Case size	39mm	42mm
Lug-to-lug	44.5mm	46.2mm
Years produced	1988–2009	2021–present
Brand tier	luxury	luxury
Era	vintage	modern
Movement tier	In-house manufacture	In-house manufacture
Market median (excellent / full-set)	n/a	n/a
Typical range	n/a	n/a
Confidence	low	low
Categories	chronograph, sport	chronograph, sport
Editorial	yes	yes
Typical price (2026)	$1,500 – $2,500	$5,500 – $7,500
Service	n/a	Every 8 years · $600 – $900
Collector note	sleeper: The Speedmaster Reduced with its automatic movement offers the iconic silhouette at a fraction of the Professional price; undervalued because it lacks the NASA story.	landmark: The Cal. 3861 Moonwatch is the only watch NASA has ever certified for extra-vehicular activity and remains in continuous production, making it the single most historically documented wristwatch in circulation.
Named dial variants	n/a	1 variant