Omega Speedmaster Moonwatch Professional White 3861 Sapphire 310.30.42.50.04.001 skydweller the 278274 sits as the

the 278274 sits as the white gold bezel Oystersteel configuration — distinct from the 278273 in yellow gold Rolesor by case construction

Despite being produced alongside more advanced models until its discontinuation in 1999

The grey and blue combination is the more restrained variant in the current Diver 300M steel range: against the all-blue (210

it balances functionality with exceptional artistry

Omega Speedmaster Moonwatch Professional White 3861 Sapphire 310.30.42.50.04.001 skydweller the 278274 sits as theOverview The Omega Alaska Project a series of experimental Speedmaster prototypes developed for NASA in the 1970s featured white cases and dials to reflect solar radiation and manage thermal extremes in space. The 310. 30. 42. 50. 04. 001 is the Moonwatch Professional's acknowledgment of that development chapter: white dial, black contrast elements, sapphire crystal, and the Calibre 3861 architecture in the configuration that makes the Alaska Project