cost mark

English

Noun

cost mark (plural cost marks)

1. Any of a series of usually arbitrary codes used by jewelers to communicate prices secretly.
   • 1913, Credit & Financial Management, volume 13, page 789:

     The first was found to contain $10,000 of diamond mounted goods, each piece still being tagged with Shoop's private cost marks. The second package contained nine papers of loose diamonds, valued at $6,000, […]

   • 1922, The Jewelers' Circular, volume 85, number 1, page 89:

     82 assorted finger rings with various cost marks some of which are as follows: […]

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