PARAGUAY (1960) UN and Paraguay flags*. Color shift resulting in doubling of the flags. Scott No 571, Yvert No 587.
AVAILABLE AT $20
PARAGUAY (1960) UN and Paraguay flags*. Color shift resulting in doubling of the flags. Scott No C273, Yvert No PA265.
AVAILABLE AT $20
U.S.A. (1968) American flag*. White House*. Scott No 1338. Yvert No 842. Nice perforation error in plate block of 4: the margin by the plate block is imperforate! **.
AVAILABLE AT $100