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Welcome to Postmark Shapes!
Welcome to a forum built around the shapes and structures of postmarks. You can browse discussions on region themes, duplex cancels, scan sharpness, and album sequences, and share your own observations when ready. Guests are invited to read freely and join in wherever a topic fits.
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Postmark Shapes — Catalog and Auction References
Discuss catalog and auction references in the context of postmark shapes. Include methods, observations and useful examples.
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