Hallmark, January 7, 1954-1958 "NP"
Hallmarks
- Metal: Silver, Gold, Platinum
- Letter: NP
- Year: 1954-1958
- Shape: Square with clipped corners
- Description: Hallmark with the letters "NP" - meaning does not correspond to the standard. For platinum, gold, and silver items below the established fineness. Shape: Square with clipped corners. Metal: GoldPlatinumSilver
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