Hi, this is my first post from Italy. I'm Francesco, my beloved father passed away in 2020, in my town (Brescia) Coronavirus killed hundreds of people . For 45 years he worked for a rifle factory. An american friend in the middle 70's gave him a colt knive. Can anyone give me some information about the knive(Hartford CT)? why are there 2 letters engraved in the handle? thank you very much.

PS: excuse my terrible english, i hope i respcted the rules of this wonderful forum 

Francesco