5. US Zip Code Blocks
Scott# 1569-70 “APOLLO – SOYUZ SPACECRAFTS” ZIP/MAIL EARLY BLOCK (4) MNH
5. US Zip Code Blocks
Scott# 1569-70 APOLLO-SOYUZ ZIP BLOCK (4) WINDSOR CO, CDS CANCEL
5. US Zip Code Blocks
4. US Plate Blocks & Multiples
Scott# 1572-75 “USPS BICENTENNIAL” MNH PLATE STRIP (20) W/ZIP & MAIL EARLY MARKINGS
5. US Zip Code Blocks
Scott# 1572-75 “USPS BICENTENNIAL” SE-TENANT ZIP BLOCK (4) MNH
5. US Zip Code Blocks
5. US Zip Code Blocks
5. US Zip Code Blocks
5. US Zip Code Blocks
4. US Plate Blocks & Multiples
5. US Zip Code Blocks
Scott# 1582 “SPEAKERS STAND” MNH ZIP BLOCK (4) NICELY CENTERED
5. US Zip Code Blocks
Scott# 1582b “SPEAKERS STAND” MNH ZIP BLOCK (4) TINTED PAPER