Well, as Mart would say..lets have a look at the back....i think the Doubtful Dinahs on here were expecting them to be made of Aluminium...i can,t see repo,manufacturers going to the trouble of making them from tin then having them enamelled...how thick is the tin...it should be approx 2/3mm...and not bendy...if they are genuine...and its looking that way..then..they are most likely from the era ....when....adverti sements for cigarettes...told us they were good for you, and gave you pleasure....1950,s/60,s...