Appears to be Czechoslovakia Postage Due Stamp (Scott J9) that has been printed on a sheet which had been previously used to print a different stamp (Scott 3). The issue dates of both stamps are very close, only three months apart, and the paper seems to be different than what the stamps were issued on. I assume that it may be from test prints of the stamps.
I am new to stamp collecting and this is my first post, so some insight into whether I am correct or not is greatly appreciated.
Thank you,
Posted 03/30/2022 12:42 am
