Gas tank marked KZ440LTD. Looks like it fits 1979-1983 models. I do not have the key but I opened the gas cap with several different keys so it is not key specific. The inside looks good from anywhere you can see through the fill neck. Please look over pictures closely to see condition. Fits models and years listed below. It has several dents and its rusty by the emblems on the outside but I can not see rust inside.  Thanks for looking