#1541e - 10c (1974) Minerals
Right Margin Block of 4
Including 1539b & 1541d
1539b - Black & Purple Omitted
1541d - Black & Red Omitted
1538 & 1540 Partial Color Omitted
ONLY 4 BLOCKS EXIST!
One of the RAREST 20th Cent. Errors
Net $7000.00