The two clay 40c printings

The first printing, from 1943, is on the second clay paper, the CL1B. The RA is vertical. The paper is of medium thickness and poorly perforated.









The second printing is on lighter colors and from 1952. The paper is thinner, the CL2B. The RA is horizontal.













Here is a comparison. The top two stamps are CL1B, and the bottom two are CL2B.