UNITED STATES OF AMERICA, 1996  

U.S.A. 1996
Four @ 32 c., printed alternating in sheets.
Eohippus, Woolly mammoth, Mastodon, Saber-tooth cat.
 
Issue date: 8-th of June.
 
C a t a l o g u e    n u m b e r s
Michel  2735-2738 Stanley G  3212-3215
Yv et Tel  2510-2513 Scott  3077-3080

Eohippus should be Hyracotherium,
Woolly mammoth is Mammuthus imperator,
Mastodon should be Mammut,
The saber-tooth cat is Smilodon.
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TvE