Postcard Origins

Postcard Origins is a free reference for dating and identifying old postcards.

It offers production-number decoders for Curt Teich and Detroit Publishing cards, a step-by-step era wizard, an illustrated stamp-box directory, US postage-rate tables, and guides to publishers, stamps, and postmarks.

Every example is scanned from a private collection, and every date is traced to a cited source and marked as exact or an estimate.