A 0.01 g precision scale is the numismatic test that does not lie when design copies well—mint nominal weight to two decimals weeds out fakes before you pay for grade.
Without calibration weights and a draft shield, «close enough» readings fool you on 7–31 g coins.
Calibrate before trusting
- 100 g / 200 g certified or M1 class weights.
- Rigid surface—no wobbly wood desk.
- Tare the felt pad—weigh coin only.
Weight + caliper matrix
Matching weight with wrong diameter or thickness suggests plating or odd alloy. Same session digital caliper—see hub scales and caliper guides.
Amazon
0.01 g resolution, small pan, draft shield—skip kitchen scales for auth.
- Cross hub `bascula-digital-de-precision-0-01g`.
- Affiliate ready.
- Log weight on coin record.
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