Use clean tongs and support the paper rather than touching gum or perforations.
Identification rule: record what is visible before assigning a catalog number or value.
What to record
- Work over a clean neutral surface.
- Use smooth philatelic tongs.
- Keep food, drinks, tape, and rubber bands away.
What commonly causes mistakes
- Fingers transfer oils and moisture.
- Bent perforations and gum disturbances are permanent condition changes.
- Old glassine can become brittle or acidic.
A practical research sequence
- Photograph before moving fragile material.
- Lift from a strong edge with tongs.
- Place in an inert stock card or mount.
- Record any loose pieces or original enclosure.
Condition and value
Value depends on exact identity, condition, centering, gum or cancellation, faults, certification, demand, and a defensible comparison set. A famous design does not automatically make an individual example rare.
Compare current collector listings
Use listings to study descriptions, scans, certificates, and market supply. Asking prices are not completed-sale evidence.
Compare collector listings