Omega Speedmaster Professional Ref 310.30.42.50.01.001, Full Set

The Speedmaster was introduced in 1957 as a sports and racing chronograph, complementing Omega’s position as the official timekeeper for the Olympic Games.  Its iconic place in history stems from its use by NASA for the Gemini and Apollo missions, and eventually by the
astronauts on the Apollo 11 mission, which made it the first watch to be worn on the moon.

The Speedmaster Professional Ref 310.30.42.50.01.001 features a 42mm stainless steel case with a Hesalite crystal.  The matte black dial features the familiar three recessed registers, as well as a “step-down” dial, which has not been used in a Speedmaster dial for over 50 years, adding dimension and depth to the watch's face.  The number of hash marks between the minutes has decreased from 4 to 2, resulting in a less busy appearance.  The tachymeter bezel insert is made of aluminum and marks the return of the dot over 90, a welcome return to the original Moonwatch design.  Powered by the updated Calibre 3861 manual-wind
Co-Axial movement, the Ref 310.30.42.50.01.001 is a certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. It features a free-sprung balance with a silicon balance
spring, a Rhodium-plated finish, and bridges etched with straight Geneva waves. This timepiece features a 50-hour power reserve and is water-resistant to 50 meters.  The stainless steel bracelet features brushed links with a taper, ranging from 20mm at the lugs to 15mm at the clasp.

This Omega Speedmaster Professional Ref. 310.30.42.50.01.001 was purchased new in 2022 and remains under its factory warranty.  This timepiece includes the outer and inner boxes, operating instructions
booklet, warranty card, pictograph card, chronometer certification card, customer service card, the Speedmaster Legendary Moonwatch book, the polishing cloth, and the original stainless steel Omega bracelet.