Mars Metal's Specialty Casting Division is your source for lead ingot, which can also be referred to as pig lead, bar lead or lead bullion.
Figwe 8. (a) Lead ingot (Group 2). Obverse bearing 'D' below Crown (25
ingot British Museum
Lead ingot hi-res stock photography and images - Alamy
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Functional object - Lead Ingot, circa 1878
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Lead Ingot, Pig Lead, Bar Lead, Lead Bullion
Roman lead bar found in Wells field fetches £25,000 - BBC News
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FMF - Friends of Minerals Forum, discussion and message board :: View topic - Old lead ingots with mine of Our Lady of Montserrat