1999 Palau
2002 Palau
2000 Palau
1997 Palau
2008 Palau
1998 Palau
2001 Palau
2003 Palau
2004 Palau
Commemorative proof cards each feature a stamp from US #2991.
Fleetwood cover set celebrates 11th International Botanical Congress (1969).
Own the largest tax revenue stamp ever issued! Selections vary.