ak, Your knife is a 1978, 112. It looks to have 2 dots, one on each side of the 112. (*112*). The 2 dots came out in 1974 with a beefy square frame. All rocked along fine. Then in 1978 Buck looked at some different handle pin options. Trying 2 small pins, 3 & 4. Then arrived upon 3 larger headed handle pins in mid to late 1978. Which is the pins yours has. It's blade is of 440C and handles of solid macassar ebony. A fine model in good shape. DM