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1940 Omega Jumbo Cal.30T2

14-days Inspection Period / 1-year Warranty


Delivery: ca.10 days

This is a truly rare and very early execution of the famous Cal.30T2. This 38 mm Omega was made around 1940 when most watches were offering cases between 30 and 34 mm, The exceptionally big case features a very thin bezel giving more exposure to its' oversize dial. Knife sharp, rare and very charmingly aged vintage timepiece.

The watch went through complete service in June 2018. Technical warranty: 1 year.


  • Stainless steel 3-body case with snap-on case back. Satin and high-polished finishing.
  • Professionally polished. Showing perfect geometry, extremely sharp edges and no traces of use.
  • 38 mm (without crown) / 45 mm (lug-to-lug) / 20 mm (between lugs)
  • Genuine steel crown signed with Omega logo. Later replacement (from the 50s)
  • Replacement plexiglass crystal


    • Manual-winding with sweep seconds hand
    • Cal.30T2 signed "Omega Swiss"
    • Nickel-plated, 15 jewels, 18000 A/h and 43 hours of power-reserve. No shock protection.
    • Serial number: 9711510
    • Fully serviced in June 2018


    • Untouched original two-tone dial showing pronounce aging of the surface on the outer perimeter of the dial and moderate uniform aging in the middle section
    • Signed "Omega" at 12 o'clock. Correctly bearing no "Swiss Made" at 6 o'clock.
    • Decorated with gilt Arabic numerals
    • Original golden hands in excellent condition

    Delivery set:

    • The watch with handmade strap and generic steel buckle
    • 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.