U.S. Scott # UC 21R/13, UPSS #AM70R/41 1951 6c Re-Value of UC14 5c DC-4 Skymaster, Die 1 (Tail Skid Round), Border Type b/2 - "Rubber Die" Variety - Mint (See Warranty)
MINT, and in excellent condition. Envelope Size 6 3/4" x 3 3/4".
Other Details
UPSS #AM70R - SIZE 13 - KNIFE 78 - WATERMARK 41 - "6" is Solid Color - The "Rubber Die" variety is a blotchy impression, produced by experimental hard rubber dies. This variety is not listed in Scott, but is mentioned in the UPSS 20th Century Envelope catalog.