OK, your skid steer looks different on the front arms compared to my 863f. See attached picture (area circled in Yellow)
"Most" not all late 80's thru mid 2000's had the P.N. stamped on front area or rear right (See attached picture area circled in Red). That is where a typical secondary P.N. is stamped. You might have to scrape away paint, or use a wire brush. Once you locate the P.N. call your local Bobcat Dealer and they should tell you the model, ect. Keep your fingers crossed it's not stolen . Let us know update.
P.S. picture where my finger is at, if you look you can see the Bobcat stamping of the secondary P.N.
Good luck.
Todd