All About Pocket Knives

I have winchester coffin bolster jack #2513. Saw on youtube about a winchester coffin bolster jack #2921, it also has winchester ink on main blade, and
"87 under 2921 model number. I think made by bluegrass.
Mine just has regular tang stamp and 2513 on pile side of tang. I'm thinking i might have an original from back in the day??

If you would, please post pictures of your knife.
Several clear, in-focus pictures from straight-on (not from add angles) of the knife from every side can really help identify the knife.