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1974 Omega Speedmaster Mark 125 Chronometer

Free Worldwide Insured Courier Shipping / 14-days Inspection Period / 1-year Warranty

Payment via bank transfer is subject to a 5% discount! Contact us for details.

Delivery: ca.10 days

Massive, charismatic, precise but still underrated timepiece built by Omega in 1974 to commemorate its' 125th anniversary. Back in that time, this watch was truly innovative and apparently a right choice to mark numerous achievements over Omega's history. The Mark 125 was the very first automatic chronograph officially certified as a chronometer in Switzerland. This particular piece has the reference 3780801 / 1780002 and is preserved in great condition - with a strong case and mint integrated bracelet showing little to no stretching. It features gorgeous black/dark gray dial with uniformly aged tritium markers and handset. 

Fully serviced in May 2018. Technical warranty: 1 year.


  • Mint stainless steel 2-body case with screw-down case back bearing "Hippocampus" and signed "Speedmaster"
  • Professionally detailed to Omega factory specs
  • 42 mm (without crown) / 51 mm (lug-to-lug) / Integrated lugs
  • Correct integrated tachymeter bezel in mint condition
  • Original steel fluted crown signed with Omega logo. Original pushers.
  • Genuine Omega service mineral crystal with bezel in excellent condition


    • The first COSC-certified chronograph-chronometer 
    • Famous Cal.1041 based on Lemania 1341
    • Gold-plated, 22 Jewels, 28800 A/h, 40 hours of power reserve.
    • Serial number: 38292829
    • Genuine Omega service rotor
    • Good condition. Fully serviced in May 2018.


    • Original untouched dial in excellent condition with moderately aged tritium markers
    • Signed "Omega Speedmaster 125" at 12 o'clock, raised silver Omega logo. Signed "Automatic Chronometer" at 3 o'clock, and "T Swiss Made T" at 6 o'clock.
    • Original correct hands in excellent condition. Tritium aging matches the aging of indexes on the dial.

    Delivery set:

    • The watch with original integrated Omega bracelet ref.1221/212 fitting a wrist of maximum 18.5 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.