Old 05-20-18, 08:11 AM
  #5  
T-Mar
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+1, Shimano 600EX, if OEM, would place it 1978-1983, however the presence of what appears to be Shimano EF dropouts would place it 1980-1983. The braze-on complement and cables running over the BB shell are also typical for the era. It is almost certainly Asian in origin. The serial number should tell us the exact manufacturing date and may identify the manufacturer.
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