20 INVERTED YELLOW HAMMARSKJOLD Fresh Bright USA Postage Stamps + 1 Normal Stamp - Issued 1962 Sensation!

20 INVERTED CENTER YELLOW HAMMARSKJOLD Fresh Bright USA Never Hinged Postage Stamps - Issued 1962 Sensation! - 1204. Plus one Normal Stamp for Comparison. These USPS issues were the sensation of 1962 stamp issues!! The normal stamp is shown in the second scan.

This offering is for 20 Inverts plus 1 Normal Stamp for comparison.

All stamps are from a smoke-free office.