Curt-Teich Linen postcards use date codes.

Look at the lower right corner...see the 2A?

Letter is for the decade, number is for the year.

A is 1930
B is 1940
C is 1950
D is 1960

1 is 1, 2 is 2, etc.

So...2A is 1932.

The card below is also 1932, but the code is in a slightly different spot. Sometimes the date codes are on the back, or even in the stamp box.

1C would be 1951....6B wold be 1946...etc.