Silvermat’s hallmark is a fleur-de-lis over a big letter “S” — you can’t miss it. The ingots date to the 1980s (one reference book pins them to 1986), in 1, ~5, and ~25 oz sizes. Collectors have documented five variations; the ones stamped “1 troy oz” should weigh a full ounce, while unmarked versions can run a touch light.
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