1954 Rolex Datejust "Ovettone" Ref.6305 18K YG

About our pricing

Something that you don't see often - Rolex Datejust "Ovettone" Ref.6305-1 featuring 18K yellow gold so-called "Big Bubbleback" case. It was one of the few last references to use Bubbleback movements before cal.1570 was introduced. 

The watch went through complete service in May 2016.


  • 18k solid yellow gold 3-body case with screw-down case back and crown.
  • Professionally polished to Rolex factory specs. Showing no traces of use.
  • Genuine Rolex fluted bezel in 18k yellow gold (later type for ref.1601)
  • 36 mm (without crown) / 50 mm (lug-to-lug) / 20 mm (between lugs)
  • Original yellow gold fluted crown signed with Rolex crown.
  • Original plexiglass crystal 
  • Serial number: 971775


    • Automatic chronometer with sweep seconds hand and date, non-quick-set.
    • Cal.745/A296 signed "Montres Rolex SA, Geneva Swiss, 18 Jewels 7 Jewels Rotor"
    • 18000 A/h, 45 hours of power reserve
    • Serial number: 84829 / Rotor: 98719 w battery. 
    • Mint condition, professionally serviced in May 2016.


    • Original service dial by Rolex, replaced most likely in the early 1960-s along with hands. The dial is in perfect condition except little flaw - the lume plot at 10 o'clock.
    • Raised golden Rolex crown at 12 o'clock. Signed "Rolex" and "Oyster Perpetual Datejust" at 12 o'clock, signed "Superlative Chronometer Officially Certified" and "T Swiss T" at 6 o'clock. 
    • Genuine service hands replaced with the dial. Perfect condition and matching tritium color.

    Delivery set:

    • The watch comes with RIOS1931 genuine leather strap and generic gold-plated 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.