310 without date code?

[Happy Hippo]

People on FB are saying they have 310s without a date code stamp. The only one I've seen like that is the one where they have a tiny outline of Idaho stamped on one of the other blades. They are saying theirs don't have that. I don't have pictures of the other blades. Perhaps the blade was replaced or maybe Buck forgot to stamp Idaho on them. Otherwise, are there years of production on the 310 where there was no date stamp?

 

[Buck Knives Inc.]

We have produced 310's all the way up until 2021. I am surprised to hear of them not being date stamped.