Shimano FC-6207 Crankset Biopace 600 EX with BB. NOS New in box

New in Box Shimano 600 EX Biopace Crankset.  Shimano part number FC-6207.  170 arms, 42-52 chainrings.  Never mounted.  Complete with English thread bottom bracket. Perfect for your early to mid 80s Japanese, American, or English racing bike.  Many people took off the Biopace chainrings and put round on, and tossed the originals, so new ones like this are hard to find.  They really ride very nicely.  Free US Shipping.  International shipping through Ebay Global Shipping.
I noticed this crank does not come with a plastic sleeve for the bottom bracket, but I will include one.