This offering is for a new-old-stock (NOS) Shimano 600EX left crankarm (Model FC-6207) in a silver finish. The crankarm is made from a forged aluminum alloy, so it should be fairly strong/durable and hold up well under most conditions. The date code stamped on the backside of the crankarm indicates a mid 80's model, so during the period Shimano was rolling out their index (or as Shimano used to call it, "SIS") shifting drivetrain.  I can also confirm the Shimano 600 drivetrain from this period would have been marketed primarily as a 6-speed groupset (although this crankarm should perform fine with other drivetrains...i.e., 5, 6, 7 and 8-speed drivetrains. 

This crankarm measures 170 mm in length and is designed to accept a JIS spec'd square-tapered bottom bracket. Please also note we are not including a bottom bracket spindle length requirement with this offering, because this spec is more critical to the right crankarm...so the desired spindle length will depend on the intended right crankarm match.

The finish is a polished silver and the overall condition is nice, with only light shopwear (scuffs and scratches). This is probably not all that surprising given the 30+ years of storage time. Listing Update...I should also note we have updated the listing pictures to reflect the next one of these left crankarms that will sell.  The shopwear does not always show up quite as well in the pictures relative to what I see in person (and just want to be honest about this), but I can confirm the pictured crankarm will be the next one to sell/ship. A final note...I do not have a crank bolt dust cover for this particular offering.