US 1989 #2433, #2438, C126 World Stamp Expo, set of three S/S Mint NH
US 1989 #2433, #2438, C126 Future Mail Delivery, Expo, set of three S/S Mint NH
ref:f.6.44pcn5.15
_gsrx_vers_1545 (GS 9.4.1 (1545))