1940 Rolex Oyster Perpetual "Bubbleback"

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Something that you don't see often! An original Rolex "Bubbleback" from ca. 1930. It is nicknamed so because of the caseback's shape which is rounded to fit rotor of automatic winding mechanism. The legendary watch features waterproof "Oyster" case with famous screw-down crown and screw-down caseback as well as chronometer-grade automatic movement.

This particular example is notable for all original salmon-colored dial and "Mercedes" hands showing minor yet charming patina and still bearing original radium lume. Outstanding example for true Rolex aficionado, a chance to wear a history of the most prominent watch brand in the world on your wrist. 

The watch went through complete service in May 2017.


  • Stainless steel 2-body case with screw-down case back and crown.
  • Professionally polished. Showing no scratches or dents.
  • 31 mm (without crown) / 38 mm (lug-to-lug) / 17 mm (between lugs)
  • Original signed crown.
  • Service plexigladd crystal 
  • Serial number: 199427


    • Automatic chronometer with sweep seconds hand
    • Cal.745/A296 signed "Rolex Perpetual Swiss Made Patented"
    • 18000 A/h, 45 hours of power reserve
    • Mint condition, professionally serviced in May 20176.


    • Original sector dial. Showing certain ageing at 9 o'clock and minor spotting in the middle part of the dial.
    • Some experts say that the dial may have been refinished in the past. Despite overall correct layout and radium indexes, they say that the signature is unusual for Rolex dials of that period
    • Signed "Rolex Oyster Perpetual" at 12 o'clock. 
    • Original "Mercedes" blue steel hands with radium lume. Original sweep seconds hand.
    • Radium-based lume is still quite active showing up to 65(!) uSv/h dial up and up to 2 uSv/h caseback up.

    Delivery set:

    • The watch comes with genuine leather strap and generic steel buckle
    • Suede leather watch travel case
    • Our company’s warranty certificate, invoice and general terms and conditions.

    Collections: Archive

    Category: Rolex

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    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.