The 6309 is immensely popular with Seiko collectors, and while it is (in my opinion) currently grossly undervalued, it is gaining in popularity and garnering more respect in the vintage watch community as well. While it is by no means a scarce watch, they are getting increasingly more difficult to find in good, original condition. This is also worth a try THE SEIKO WATCH PRODUCTION DATE CALCULATOR if you are not sure what decade your Seiko was made in, it works for some but not others but a nifty little application. Please remember that this is just an approximate guide and can not be used as a 100% accurate outlook as per how old your watch.
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