I have a Jupiter stamped with JAS-667 and Taiwan and a 9XXXXX serial so it seems like a 1990 JAS-667 made in Taiwan which by looking at it seems about right and after 17 years it's holding up pretty well and sounds pretty good as well. I think the JAS-669-667 are later models, can any owners help verify this. If it's a JAS-667 why has it also got the 669 in the model name?Īre the JAS-669-667 later models or just a model variation on the JAS-667. ![]() The A serials seem to be from 1999 so maybe they use letters for the years now to avoid the no decade problem, like a 5XXXXX serial can be 1986 or 1996.ĭoes anyone know why there are JAS-667 and JAS-669-667 models. ![]() I've read that for Jupiters after 1984 you add 1 to the first digit of the serial number for the year of manufacture.
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