My Remington(Camillus Made) 1985 Double End Equal End Jack Knife(commonly erroneously called a “Moose” patterned knife)
Sta-Sharp, a Sears store brand, circa 1924 to 1941. Could have been made anywhere in that time frame, no way to date it any closer. Camillus made. Carbon steel blades, black bone handles. I bought it in 100% mint condition in 2008 for $10(yes, seriously!) , it now has a bit of patina on it from my carry and use.
And last but not least, my Dads Schrade 225H, made circa mid 1960s, or early 1970s. He carried it through most of the 70s and 80s while homesteading in the AK bush.