Double J, most of the ones I've seen that measure to .01 g have a capacity of 50 g. Rare is the case in which you need that accuracy for something > 50 g.
Inordinately fascinated by bits of metal with strange markings and figures
Capacity of 20 grams wouldn't be adequate. Many coins weigh over 20 grams and a lot are over 30 grams. I would say 50 grams of capacity would be the minimum and a resolution to 0.01 grams. Mine technically reads to 0.005 grams but accuracy to 1/100 of gram is fine.
two decimal places and 200g capacity is sufficient for me. Three decimal places would be better suited for gold, platinum, and conducting specific gravity calculations which requires a great deal of accuracy.
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