How old do you suppose this is?

I found this at a garage sale a little while back and have been checking my boolits with them... But I got to wondering... How old do you suppose this can is?
Attachment 228271

I have one just like that. Bought back in the mid 60's. Mine are 30 cal.

I have that same tin, 35 cal. , purchased in 1968. My first gas checks .
I keep it because some companies use thin cardboard boxes that fall apart.
50 years and that tin container still working .

Old I have whole bunch of those I bought new years ago. Now you make me think I am old.

I had one like that in the 70s.

Saw 2 cans of those yesterday at the gun shop. 44 & 45’s.

The Hornady gas checks I have, that I bought in the late 1970s (I think) for 44 mag are in a red box.

I must have just missed them when I got started in the seventies .

Jack