Vintage 1st generation Shimano Dura Ace Cranks. 170mm arms. 130 BCD. 52/39T Rings.. I originally thought these were NOS, but they do show the slightest signs of use. Threads are good. Rings are excellent, Tapers and excellent, Original dust caps on board. Suitable for vintage road, or swap the ring and run them on your old school BMX bike. Please take a look at the pics and email with any questions prior to bidding. New Old Stock does not equate to Mint condition, they are unused items that may have some shelf/shop wear. Due to past experience with buyers abusing the eBay return system, I no longer accept Returns on items. If you have an issue with the item you receive, please contact me as most things can be resolved with simple communication. All Complete bicycles are shipped partially disassembled. Depending on you mechanical aptitude, re-assembly may require the help of a professional bike mechanic whose services you will be responsible to pay for. Shipping is quoted for the lower 48 United States. All others must contact for a shipping quote. Thanks!