How Would You Date This Early Dura Ace Crankset?
05-10-13, 12:43 PM
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How Would You Date This Early Dura Ace Crankset?
I own a few and have seen several more, but never one like this. There is a single number two stamped, or perhaps over-stamped into the drive side arm, with corresponding indentations in the sides of the arm. All the arms I've seen have had the regular two-letter date stamp, but nothing like that on this set. How would you date them?
05-10-13, 01:02 PM
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Looks like it could be first gen Dura Ace crank....as early as around 1972...
It could also be second gen, but those were pretty much identical to these but issued with black anodized chainrings...I think the 2nd gens were issued around 1974...
Here's a pic of my 1st gen DA crankset with custom drilled chainrings as mounted on my bike from 1972:
It could also be second gen, but those were pretty much identical to these but issued with black anodized chainrings...I think the 2nd gens were issued around 1974...
Here's a pic of my 1st gen DA crankset with custom drilled chainrings as mounted on my bike from 1972:
Last edited by Chombi; 05-10-13 at 01:25 PM.
05-10-13, 04:38 PM
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The LineSeeker is looking well finished, great preservation job imo.
I believe this is the very first crankset to have 130 BCD. Also the 1st Dura-Ace crankset.
I've had two, and both came with 50/39t rings.
Produced around 1974-1978
It was followed by the AX version that had the spider rotated out of symmetry by 15 degrees or so, and with an oversized pedal thread (option?).
I believe this is the very first crankset to have 130 BCD. Also the 1st Dura-Ace crankset.
I've had two, and both came with 50/39t rings.
Produced around 1974-1978
It was followed by the AX version that had the spider rotated out of symmetry by 15 degrees or so, and with an oversized pedal thread (option?).
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