Speedmaster Professional Moonwatch

Ref. 145.022

discontinuedCaliber 861 transitionDocumentedEvidenceProbableLast reviewed Not yet reviewed

Lineage← 145.012145.0223590.50 →Compare with previous Compare with next

Component compatibility

What this reference is documented to have carried, and in what capacity. A service part is the manufacturer's own work; only a counterfeit classification is a finding against the watch.

Documented calibers

Omega 861FactoryDefault configurationHigh confidence
≤ 1996
Omega 1861FactoryProbable
1996 →
Late production, after the change to the rhodium-plated caliber. The exact changeover year is unresolved — see the associated research gap.
Omega 1861ServiceProbable
Whole production
Omega service fitted 1861 parts into 861 movements as 861 stock was exhausted. A mixed-plating movement is a service history, not a finding against the watch.

Components

CrystalSpeedmaster Hesalite crystalFactoryDefault configurationHigh confidence
Whole production
CasebackSpeedmaster Professional caseback with NASA / lunar textFactoryDefault configurationProbable
Whole production
Lunar text is correct for this reference's production; the specific wording and layout are period-dependent within it.
Bezel insertSpeedmaster tachymeter bezel — dot over 90 ('DO90')FactoryProbable
Whole production
Associated with earlier 145.022 production. A dating aid for the bezel itself; bezels are frequently swapped, so it establishes little about the watch on its own.