Recently purchased a D6C Dozer and these tracks came with the purchase, was told they were a spare set for the D6C, rails are too wide for the D6C, so my loss is your gain.
these are CAT rails and grousers one side rail number is 1S1864, 37 links and Grousers 22 inches wide, rails are almost 8 inches wide, center of pins are 8 inches, have not been in use very much barely can feel any wear on the bushings, bars are 2.75 inches high, matching pair, the information I have found for the 1S1864 says they are for D7 or 977 etc.
Asking $4000 or best offer, does not have alligator master link, I can send more pictures or info as needed for serious inquiries, Cash is King, no checks, I have a backhoe I can load onto your trailer. I am in Marion, North Carolina, contact by email This email address is being protected from spambots. You need JavaScript enabled to view it. if interested then I will give you my phone number, Thank You, Ricky I would consider a trade for equal tracks that fit D6C