Undated
Ostby & Barton
The metal-standard text separates O and B, with an adjacent cross. This differs from a compact punctuated O.B. punch.
Read the stamp
What does 10KP mean on jewelry
With a 10KP stamp, 10K GF, 10K RGP and 10K HGE describe the gold layer over another metal. 417 is the corresponding common fineness stamp.
10K and 417
The karat figure counts gold parts out of 24. 417 is the corresponding common fineness stamp. KP is read together; P does not stand for plated here. Rings often carry the stamp inside the band; chains may carry it on an end tab or clasp.
What to check next
10K GF, 10K RGP and 10K HGE describe the gold layer over another metal. Retain the suffix when reading a small stamp. Compare a worn K with the letters in any maker signature beside it; the maker initials and the purity mark answer separate questions.
Related marks
41 marks
Undated
Shiman Mfg. Co.
Source entry dates: c.1934, c.1950, c.1943.
Newark NJ, United States
cartouche, frame, hexagon
Granbery, J.A. & S.W.Maker name
c. 1900
Granbery, J.A. & S.W.
Newark NJ, USA
Founded as Cutler & Granbery | : | 1907: | 1931: Closed | Specialized: 10K Pins – Hat, Scarf, Bib, Belt, & Veil, Bracelets, Brooches, Fobs, Tie Clasps, Pendants, Chains, Beaded Necklaces & Lockets.
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