Its the manufacturers initials. It was mas made by SB Jewelers by Shalom Bensoor. They opened in 1978
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SB3 4 F1 by: Kristin
Same problem solitaire ring with yellow gold band marked 14K for the gold but also SB the numbers 3 then a space then 4 Fl with a triangle
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Dating an Antique Diamond Brooch by: Anonymous
Hi Lee thank you for writing in with the following hallmark question:
"I need some help identifying the marking on the piece of jewellery I have bought. It is a 0.50ct diamond swirl design on yellow gold with the marking stamp "SB 10K". I guessing the 10K is USA? but not sure about the makers mark SB? some searches on google show it could be The S. B. Company from the Victorian period of design. Can anyone confirm this?"
Gorgeous! There are a number of maker's who used SB initial mark. Uhmmm... So there is a dot between the letters? Could you examine the mark with a jewelers loupe or magnifying glass and let me know what the jewelers loupe tells you about the shape of the punch mark behind the letters? This info will help with the dating.
