Overview Other Details Product Description MINT, F-VF or Better & Never Hinged. Other Details The U21 envelope was issued in the small size only, with Border b(2). No Cut Squares, Full Corners, or Envelopes exist with border d(4). Many UC21s exist with the "6" shifted slightly into the design. Product Videos Custom Field Product Reviews
Quick view Details USA Scott # UC 21R 1952 6c (Solid) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2), "Rubber Die" Variety - Mint Cut Square (See Warranty) MSRP: Now: $22.50 Add to Cart Quick view Details U.S. Scott # UC 21 1952 6c (Solid) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $25.00 Add to Cart Quick view Details USA Scott # UC 22 1952 6c (Solid) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $3.00 Add to Cart Quick view Details USA Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details USA Scott # UC 14 1946 5c DC-4 Skymaster, Die 1, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details U.S. Scott # UC 21 1952 6c (Solid) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $25.00 Add to Cart Quick view Details USA Scott # UC 22 1952 6c (Solid) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $3.00 Add to Cart Quick view Details USA Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details USA Scott # UC 14 1946 5c DC-4 Skymaster, Die 1, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details USA Scott # UC 22 1952 6c (Solid) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $3.00 Add to Cart Quick view Details USA Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details USA Scott # UC 14 1946 5c DC-4 Skymaster, Die 1, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details USA Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details USA Scott # UC 14 1946 5c DC-4 Skymaster, Die 1, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details USA Scott # UC 14 1946 5c DC-4 Skymaster, Die 1, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details USA Scott # UC 15 1946 5c DC-4 Skymaster, Die 2, Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.60 Add to Cart Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details USA Scott # UC 20 1951 6c (Lined) on 5c (UC15) DC-4 Skymaster, Die 2 Border b(2) - Mint Cut Square (See Warranty) MSRP: Now: $0.70 Add to Cart Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart ×
Quick view Details U.S. Scott # UC 19 1951 6c (Lined) on 5c (UC14) DC-4 Skymaster, Die 1 Border b(2) - Mint Full Corner (See Warranty) MSRP: Now: $0.85 Add to Cart