Brand: Omega
Model: Speedmaster Professional "Straight Writing"
Reference Number: 145.022-69
Year of Production: Circa 1971
Case Material: Stainless steel
Caliber: 861, manual winding
Bracelet/Strap: Stainless steel
Bracelet Reference: 1171 with 677 end links
Dimensions: 42mm diameter
Gender: Men's
Dial: Black with luminescent baton indices, tachymeter scale
Condition: Good, with normal signs of wear
Signed: Case, dial, movement, and bracelet signed Omega

Case
The stainless steel case features a brushed finish with polished accents. The case back is screw-down and engraved with the iconic inscription: "Flight-Qualified by NASA for all manned space missions – The First Watch Worn on the Moon." This version, known as "Straight Writing," has the text arranged in straight lines instead of a curved format. Additionally, this particular watch has a personalized engraving: "Butch Thompson K.S.U."

Dial
The black dial maintains the classic Speedmaster Moonwatch layout with contrasting sub-dials and applied luminescent markers. The tachymeter scale is located on the black anodized aluminum bezel, ensuring optimal readability.

Movement
The Omega Caliber 861 is a manual-winding chronograph movement introduced in 1968 as a successor to the legendary Caliber 321. It features a cam-switching chronograph mechanism instead of a column wheel and operates at a frequency of 21,600 vibrations per hour. Known for its reliability and durability, it remains a favorite among collectors.

The Omega Speedmaster Professional ref. 145.022-69 "Straight Writing" is one of the most iconic variations of the legendary Moonwatch, produced between 1971 and 1973. Its case back features the famous NASA certification engraving in straight lines, distinguishing it from other versions. The watch retains its original reference 1171 bracelet with 677 end links, adding to its collectible value. It is in good condition with normal signs of wear, consistent with its age. The unique "Butch Thompson K.S.U." engraving on the case back adds a layer of personal history, making this Speedmaster even more special. A must-have piece for Speedmaster enthusiasts and space exploration history buffs.