Oliver Cletrac Crawler I am sorry but I am not really sure what model (DD?)it is or what year it isI dont know where to look for the serial number on this if anyone can help me I will be sure to look and put it on the description, but I do know that it runs and drives very good, it was restored years ago and is still very nice, it has a 6 cylinder diesel engine i think it is a Hercules, but not positive, it is running n the photos, it has a very ncie blade on it with down pressure, the tracks are good and it steers like a car, the steering is very good on machine, the sheetmetal is nice and straight, also has a rear winch on it that works good, the hydraulic hoses are new, the cylinders do leak some fluid, and a little oil drips from engine when sitting, the clutch and transmission are good, brake works, and like I said for a big machine it steers like a car, if you are looking for one I do not see these for sale very often and this one is selling . If you have any questions email or call me at 1-920-988-6388, I can help load and can arrange delivery if needed,I willstore the machine for 6 months if paid for please NO PAYPAL unless you contact me first, SELLS .