Hi all - new topic. I have three Model 158 Story & Clark 5' 7" grands that I tune for customers - all built by Yamaha in Japan. I have tried to date manufacture year but the serial numbers on the pianos do not look like they fit the time frame for the Yamaha numbers in Pierce. The serial numbers respectively are 394034, 464136, and 901102. I know they were manufactured after the dates posted as Yamaha Japan numbers and before QRS purchased them, their last production date was 1983. Thanks in advance, Ken Gerler St. Louis, MO kenneth.gerler at prodigy.net
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