As for the prized and short-lived, rare 7T59 chronograph models, they were only made between 19. Seiko Kinetics, originally branded as “Auto Quartz” and “A.G.S” (Automatic Generation System) only appeared at the end of the 1980s. In actuality, digital watches were only commercially available in the middle of the 1970s. Or an eBay seller proclaiming a vintage Seiko 7T59 quartz chronograph as a brand new model from 2003. The chronological error of an anachronism can occur in either direction it can result from something from the past being represented as if it belonged in the present, like an archaism, or it can result from presenting something at a time before it actually appeared, occurred, or existed.Īnd anachronism is the key to manually estimating the production date of your Seiko watch.Īn example would be saying that a digital LCD watch was produced back in 1964 or claiming that old Kinetic watch in your drawer was purchased in 1983. In other words, an anachronism is something that occurs out of its proper time. What is anachronism? Basically, it is the utilization of an event, a person, an object, language in a time when that event, person or object was not in existence. Manually estimating the production date of a Seiko involves the element of anachronism. That’s when a GPS unit comes in handy! 😉 You won’t be accounting for wind conditions and at best your estimate may be a few miles off your actual position. When that happens, I would resort to what I call “dead reckoning” or rough estimation.ĭead reckoning is similar to navigating your way at sea by orientating yourself with the heavenly objects like the sun, moon and the stars. However, there are circumstances in which the calculator may give you inconclusive or erroneous results.

In most cases it should return the correct date of manufacture. In my previous article on how to date your Seiko watch, I mentioned the nifty Jayhawk’s Production Date Calculator.

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