The cans looked very similar from WWII through the 80's.
Look underneith as noted - there is a production date.
Its nice to find a can with a date that matches your jeep but the date police are not going to check!'
Watch out for the later cans with the coating inside. My 84 can has a white epoxy that is flaking . True Value sells a spout with a screen that works well at filtering the floaters.
I had a can on my jeep (some time ago when it was still running) filled with fuel. Back then I only had the spout type or German style of can. I ran out of fuel on purpose on a trip in the forest, checking gas mileage, but when I poured in the fuel from the very efficient German engineered can some of it went to the ground and some stayed in the can even though the M38A1 has an XXXL opening. If I had the US type like yours with the tube on it even the last drop would go in to the tank. The filter on the end is an added bonus.
Check your local laws first. Most states require a red container to carry gas in. Most states will let you display the empty can but many do not allow gas in it unless it is red.
The ones hanging off the back my the jeep are cleaned, degassed and lightly oiled inside.
The only one that gets real use is the 1984 version in the garage that fills the lawn mower. It has lasted longer than any of the junk plastic imported cans that always leak from the "leak proof" pour spouts.