Two uncommon first day covers featuring sawfish and sharks. The first from Nicaragua, 3/12/1969, features a Largetooth Sawfish (
Pristis pristis, here called
Pristis antiquorum) and a Bull Shark (
Carcharhinus leucas, here called
Eulamia nicaraguensis). The second from El Salvador, 7/28/1971, features a Smalltooth Sawfish (
Pristis pectinata, misspelled "
pectinatus") and a Tiger Shark (
Galeocerdo cuvier).

