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Old 09-13-10, 03:33 PM
  #4  
cycle_maven
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The J in the OP's serial number seems to indicate a frame made in 1981 if it were made by Miyata- which wouldn't be too far out to have 1983 components on it, if it were kept around for a year plus...

The M in the other poster's serial number indicates a 1984 bike.
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