Primarily Petroliana Shop Talk Forums Thread Like Summary - Gas Can Dating

Can anyone tell me the time frame or years that these would have been used? It's a a 5 Gallon and has the marker inside

Attached Images

After my initial comment, I have noticed pictures of small town delivery trucks with these cans along the truck sides. The pictures were from the 40's and 50's. So, they were apparently used over a long period of time? Paul www.severngaspumps