All About Pocket Knives

Hi, I have two pocket knife’s I acquired from my grandfather. Both Kabars but they do not have the USA or model number on the tang. Just curious why these don’t have the same stamping at the others from his collection. I’m planning on building on his collection and would like to know more as I start to add to it. See pics for details. Thanks for any information!

They did not put model numbers on blades on Kabars until 1968-69. Your knife has delrin handles which didn't happen until the early 1960s so your knife was made between those times.