Omega 3592.50.00 Speedmaster Professional Apollo XI (31549)

31549 Omega Speedmaster Professional 3592.50.00 35925000, 'First Watch Worn on the Moon', stainless steel on a stainless steel bracelet, manual wind movement, chronograph, black dial is in very nice original condition with gorgeous bright and clean patina, water resistant to 100ft, hesalite crystal with sapphire display back, Diameter: 42mm, Thickness: 14mm, Like New with original box and warranty card dated April of 1999.

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More about Omega 3592.50.00 Speedmaster Professional Apollo XI

This is a stainless steel Omega Speedmaster Professional, reference 3592.5000. It has an integral stainless steel bracelet with an Omega fold over deployant clasp, and a scratch-resistant hesalite crystal and sapphire back with anti-reflective treatment on both sides. The screw-down solid polished case back reads: "Speedmaster Apollo XI, First watch worn on the moon." The black bezel has a tachymeter scale to 500 UPH, round chronograph pushbuttons, and a winding crown protected by a crown guard. The 42mm diameter solid three-body case, straight lugs, and flat bezel are polished/brushed. The dial is black with luminous baton hands, a luminous center sweep chronograph hand, and luminous baton hour markers around an outer minute/one-fifth second track. There are three registers, including a constant small seconds subsidiary dial at 9 o'clock, a 12-hour chronograph indicator at 6 o'clock, and a 30-minute totalizer at 3 o'clock. It has a 48-hour power reserve at full wind, and it's water resistant to 50 meters/165 feet. The 13.5mm thick case, dial, and movement are all signed.

The mechanical manual winding Omega caliber 863 movement is the same chronograph movement that was used on the Moon. It's rhodium-plated, and the baseplate has circular graining. The bridges have cotes-de-Geneve embellishment; levers and bridges have polished edges. It's constructed with 18 jewels, a shock absorber device, and a straight-line lever escapement. It includes a monometallic balance, a self-compensating flat balance spring, and an index regulator. The mechanism oscillates at a frequency of 21,600 vph (3 Hz).

This Omega Speedmaster Professional Moonwatch Sapphire Sandwich, reference 3592.5000, was produced from early to mid 1990's