It's date coded 1946.

Curt-Teich cards are easy to date....

That card has the code on the front, some are on the back or even in the stamp box. Here's how to tell...

The 6B is the code. The letter is the decade:

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

0-9 is the year. So 6B is 1946, 0C would be 1950, 2A would be 1932, etc.