JJSR / J&J Smelting and Refining

J & J Smelting and Refining Corp. was a commercial assay laboratory located in California in the 1970’s. Hallmark typically is JJSR, often seen with a “S/C Circle” counterstamped.

  • Company Location(s): California, West Coast Refiners
  • Dates of Operation: 1970 -
  • Known Bar Sizes: 1, 2, ~5, ~10, ~25, ~100
  • Related Refiners:

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JJSR / J&J Smelting and Refining

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