Hi everyone selling a piece of history today the Seiko 6117-6400 World Timer from 1970 (waterproof caseback + error bezel). Condition: Very good with the exception of the mark/patina in the middle of the dial. The dial maintains great legibility and doesn't have any other marks besides the big one in the middle (no fading of the lettering on the dial or the bezel!). The watch has some very slight/light scratches from normal use but is in otherwise superb condition especially considering it's age(55+ yr old) with no deep scratches or dents, the crystal is without scratches. Functionality The watch uses automatic winding and is keeping good time and all functions like date change, GMT and rotating the bezel operate without any issue. History: This specific watch dates back to august 1970 and because of this still has 'WATERPROOF' on the caseback, watches from 1971 and later have 'water resist(ant)' due to changes in (US) regulations at the time. That's not the only historical thing about this watch, the watch has the world timer bezel known as the 'error bezel' , an intended error though, London and GMT are placed besides each other instead of on top of each other. This is due to an experiment with British standard time that lasted only a few years. Replacement dials: There are replacement dials available, they are great but they have 1 minor flaw. This model (6117-6400 white dial) has a dial with the dial code 6117-6420 , the dial code 6117-6400 is the dial code used exclusively for a black dial (and the white replacement dials as you just learned or already knew). I'm selling it with the original dial for the buyer to decide whether they want to keep it original (and maybe professionally clean up the original dial) or get a replacement dial. I personally kinda liked the spot on the dial but it's priced low enough to get a replacement dial with it and stay below 500 total spent. $425 shipping and insurance is included in the price. Payment: PayPal F&F or G&S for anyone with at least 1 transaction/reference on watchexchange (+4,3% fee for the buyer). Shipping: Worldwide with tracking, signature for delivery and insurance (FedEx to the US). Ask me for a quote any time (max $30, any shipping cost above that I'll pay). Items will be properly packaged, waterproofed and treated with extreme care. Location: The Netherlands, Europe, local pick-up also available.