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Old 03-09-17 | 04:31 PM
  #15  
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Vintage Raleigh
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Joined: Jun 2015
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From: Melbourne, Australia

Bikes: 1974 Copper Raleigh International, 1975 Olive Green Raleigh Grand Prix, 1974 Raleigh Europa Custom

Originally Posted by non-fixie
It looks like the lower part of the crank arm has been milled, thereby creating the 'diamond'. It would have been a flute before.
Maybe to reduce weight.
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