I still love the old color-coded Beeman tins. I've still got a few of them (empty) in really good shape. I grew up going through scores of these tins and always loved the way they looked. To this day, I put a little piece of blue or green painters tape on every tin I have to mark whether it's .177 or .22.
They certainly have been around for a long time...evidently from the time HW made the ether injected "Baracuda", so call it 60 years. Would be real surprised if there were not some slight weight changes or dimensional changes along the way.
Still a good choice in rifles that happen to shoot them well.
Save the tin....refill it with Baracuda's.