CUBA (1948) Mausoleum, El Cacahual*. Imperforate proof with control punch. Scott No 425, Yvert No 306. Flyspeck correction circled in red.
AVAILABLE AT $40
VIETNAM (1990) Tu Duc's Mausoleum*. Special perforated proof mounted on card with official stamp and signature. Scott No 2063, Yvert No 1027.
AVAILABLE AT $80