"Work-Man" 813^ info needed pls

[corsetina]

My 77 y.o. father in law has asked me to research his buck knife. It is marked as shown with 813^ on the main blade of three folding blades with what appears to be a brown bake-lite handle marked also with "Buck Work-Man" on both sides at the bottom. The main blade has an almost duck bill appearance but is straight in the spine. It comes with a leather sheath case marked "Buck" on the leather as well as the snap.
This is a case of lost memories with this knife, he cannot remember when or where he got it or why it is important to him. So he hopes if I can find out at least how old it is, or some details, it will help him remember himself. Any information is appreciated. Thank you.

 

[buck to buck]

hello there with the date stamp you indicated that makes it a 1988 model i am not sure of the years produced or production numbers some others on this forum may be able to help with that but i recently bought one on ebay in mint condition for about $40 hope this helps you some
b2b
bcci #688

 

[corsetina]

Thank you. I will relay the info, anything is a help at this point. The collection this man has amassed since 1930 is staggering, every description and handle, it is not surprising he cannot remember the origins of one. I will try to keep you in mind when he passes, which seems imminent, I have no use for all these knives.