Coin classifiers (fixed-compartment books) are a collector’s physical spreadsheet—see series gaps, sort by year or size, find a coin in seconds.
They shine for loose circulation and mixed lots before final capsule housing.
Chronology vs by size
By year for FNMT/euro sets. By diameter for world mixes. Do not blend rules unlabeled.
Visual advantage
- Empty cell = obvious want list.
- Two in one cell = inventory mistake visible.
- One volume to shows.
Amazon
Cells for your dominant diameter; lid version for travel.
- Scale with binder sheets later.
- Affiliate ready.
- Label spine year span.
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