• Perfin Checklist
• Railroad Perfin Checklist

Inventory Lists (U.S.)

• 1902 Definitive Series
• 1908 One and Two cents
• 2c Reds
• Army-Navy
• Bi-Colored Airmails (pre-1940)
• C1-C6 airmails
• College and Universities
• Famous Americans
• National Parks
• Overprints
• Overrun Countries
• Panama Pacific Exposition
• Perfins in Non-Denominational Stamps
• Personal Patterns
• Presidential (Prexie) – Excel
• Presidential (Prexie) – PDF
• Washington Bicents

Exhibits

• Perfins in the Postage Stamps of Cuba
• Perfins in the Stamps of Mexico
• Perfins of Austrian Levant
• Polarine Covers
• Swiss Perfin Exhibit
• U.S. Perfin Covers