1930, Zeppelin issue, 65c-$2.60, complete set of three, absolutely perfect full original gum, NH, F/VF (the high value has great centering), C.v. $1,750 (Image)

1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom right corner sheet margin (ZIP) se-tenant block of four, blue engraved color (USA and denomination) omitted, full OG, NH, VF, a common block is added for comparison, C.v. $550 (Image)