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1969 IWC Schaffhausen Aquatimer Ref.816

14-days Inspection Period / 1-year Warranty

Delivery: ca.10 days

Rare and understated icon of the late 60s by IWC Schaffhausen. The Auqatimer Ref.816 was an updated revision of the original Ref.812 offering all-new cushion-shaped case and dial designs, though, retaining the original caliber 8541 and then rather unique rotating inner-bezel. The Aquatimer's updated design was another attempt of Swiss watchmaking industry to fight the avalanche of quartz crisis and was in production just for a few years. Rare, pronounced, and offering much of the early 70s spirit.

Full service in July 2018. Technical warranty: 1 year.


  • Stainless steel 2 piece case with screw-down caseback and rotating inner bezel/
  • Professionally restored in the past. Showing minor traces of storage. The caseback has been severely polished over the time but hallmarks are still readable.
  • 40 mm (without crown) / 42 mm (lug-to-lug) / 22 mm (between lugs)
  • 2 x Original signed crown
  • Serial number: 2014460


    • Precise automatic movement with Pellaton winding system, quick-set date, and hacking feature
    • Cal.8541 signed "International Watch Co Swiss"
    • Nickel-plated, 25 Jewels, 19800 A/h, 44 hours of power reserve
    • Serial number: 2037980
    • Freshly serviced


    • Untouched original black dial in excellent condition. Showing no damages or aging.
    • Signed "International Watch Co Schaffhausen" at 12 o'clock. Signed "30 ATM Aquatimer Automatic" and "Swiss" at 6 o'clock.
    • Applied silver hour markers with lume
    • Original silver luminous hands.

    Delivery set:

    • The watch comes with handmade strap + generic buckle
    • Our company’s warranty certificate, invoice and general terms and conditions.

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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.