 | SIPEX 6th Stamp Expo Postal US Postage Stamp Regular Issue 1966 Sixth International Philatelic Exhibition Shoreham Hotel Washington DC May 21 1966 to May 30 1966 Unused Stamp Price: $0.35 - $0.18 Used Stamp Price: $0.25- $0.15 What's the Value of stamps? Stamp Collecting Online Stamps Catalogue |
| SIPEX 6th Stamp Expo 1966 |
US Postage Stamps Price Guide
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