These are mint never hinged Regular US Plate Blocks in a Harris United States Plate Block Album from 1938 to 1984
Approx. 2050 Stamps
Mint, never hinged in mounts. Good condition.
Here is a link to pictures of all the stamps. https://www.dropbox.com/sh/85fyfesx9xh2y68/AAD85jfdEoLbb_8khhrO71rYa?dl=0
S/H is $18 within the U.S.