ID help please

[RattlerXX]

Just acquired a knife collection, and this one had no box or paperwork. I need help identifying this one please. Made in USA, stamped 181 to the right of the Reeve logo.

Thanks!

 

[PNWhovian]

I’m pretty sure that’s a Shadow IV.

 

[laizhekezhui]

Shadow IV, circa 1991

 

[RattlerXX]

Thank you both. I appreciate your replies.

 

[PNWhovian]

Thank you both. I appreciate your replies.

You are quite welcome.
I used to have one years ago and stupidly sold it. Enjoy your knife and use it in good health.