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1971 Omega Speedmaster Professional Mark II Unpolished

Authenticity Guaranteed / 14-days Inspection Period / 1-year Warranty

Impressive and charismatic chronograph by Omega bearing DNA and caliber of the original Speedmaster "Moonwatch" qualified by NASA for their space missions. The Mark II was an Omega's attempt to update the design of their top-rated chronograph to fit the extensively changing watch world of the early 70s. This particular piece is notable for it's all original condition: unpolished case still showing original finishing and excellent shape of facets, original bracelet with minimal stretch and, finally, immaculate dial with immaculate hands.

Technical warranty: 1 year.


  • Stainless steel 2-body with screw-down case back bearing "Hippocampus" and signed "Speedmaster"
  • Unpolished, excellent condition showing traces of use
  • 42 mm (without crown) / 45 mm (lug-to-lug) / 20 mm (between lugs) 
  • Original integrated bezel and mineral glass
  • Original steel fluted crown signed with Omega logo. Original pushers.


    • Manual-winding, NASA-certified chronograph 
    • Famous Cal.861 based on Lemania 27 CHRO12 & Cal.321
    • Gold-plated, 17 Jewels, 21600 A/h, 40 hours of power reserve
    • Servicing history is unknown, however, the movement shows fine performance on timegrapher.


    • Original untouched dial in outstanding mint condition. All tritium plots are intact. Aging of tritium plots is matching with hands. Reactive under UV light.
    • Signed "Omega Speedmaster Professional Mark II" at 12 o'clock, printed Omega logo. Signed "T Swiss Made T" at 6 o'clock.
    • Genuine Omega hands in the condition matching the dial

    Delivery set:

    • The watch with original Omega 1162 bracelet x 173 endlinks which will fit the wrist up to 19.5 cm
    • Our company’s warranty certificate, invoice and general terms and conditions.

    Related Items

    Sizing Product

    Measuring a watch

    It is always crucial to understand the size of the watch, especially when it comes to vintage watches which are generally considered as too small in comparison with what watch industry offers today. For example, the original Patek Philippe Calatrava introduced in the 1930s was only 31 mm in diameter, while today's classic Calatrava is 39 mm. When you think about 8 mm, it doesn't seem to be a big difference, but believe it is.

    In our condition reports we normally disclose three most important parameters as follows: diameter without crown / lug-to-lug length / lug width. 

    Diameter without crown

    It is, so far, the most important measurement to understand the size of a regular round-shaped watch.It helps you to understand proportions and overall look of the watch. It is important to consider width of the bezel and color of the dial, because certain combinations may make the watch look bigger, while some other smaller. It is all very individual, however there is common understanding:

    Lug-to-lug width

    This parameter will help you to understand whether the watch is comfortable for wearing. You should compare lug-to-lug width with the width of your wrist, and if lug-to-lug width is smaller or equal, then this watch shall be comfortable.

    Lug width

    This measurement is defining what size of strap you need for the particular watch. Depending on era and manufacturer you can find watches with lug width between 14 mm and 24 mm. Most common sizes are 18 mm and 20 mm.