144 BCD Chain Rings
#76
blahblahblah chrome moly
Join Date: Apr 2009
Location: Seattle
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https://www.ebay.com/itm/185475774678
No affiliation, just bumped into those on the 'bay
I'm not certain but I think those are older because they say "Patent" on them. Newer ones say "Brev." which is Italian for patent. No idea what year the change was made, early-'80s maybe? someone here knows...
Mark B
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