With vintage Perth Mint 5oz ingots, the “999” purity stamp is not supposed to be “wide spaced” in a “leading 0 variety” as seen here with ingot (0792). This is the first known example that shows a wide spaced “999” purity while still being in 0-leading serial range. In addition, this ingot is serial stamped on the bottom-middle of the ingots backside. All wide-999 spaced Perth 5oz ingots have serials marked in the top-middle of their respective backsides. This ingot is a unicorn when it comes to classification.
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