That is really hard to say. If you post the entire serial number I may be able to five you a better idea or use this link and they can tell you what they think.
That is really hard to say. If you post the entire serial number I may be able to five you a better idea or use this link and they can tell you what they think.
Sorry about that. Serial is 740392! I get mixed results with those serial decoders. For example, here http://www.watchsleuth.com/seikodatefinder/ I get April 1997 which can't be beacuse the 7S26 movement started in 1996. So I am between 1977 and 1987.
Could be 77, 87, or 97.
Results for movement 7009 with serial number 740392 :- The watch was made in April 1977,1987,1997
They use the time frame the movement was made in to determine what year. This was made from at least 77-97 which means it could be anyone of those years. That is the best info I can give you.