Identification
Photo reference
2 uploaded photos
Overview
The brooch features a geometric modernist design constructed from silver sheet and wire, typical of mid-20th-century studio jewelry. This era is supported by the standard rollover clasp assembly. The reverse is clearly stamped 'STERLING' and bears script initials 'PTP'.
Story
The piece dates to the mid-20th century, characterized by its geometric modernist design and use of abalone shell inlay. The script 'PTP' (or possibly 'PJP') mark suggests a studio silversmith, potentially North American or Mexican, though it remains unidentified in major hallmark databases. The construction techniques are typical of the post-WWII studio craft movement. Mid-century modernist jewelry has a dedicated collector base, particularly for sterling silver pieces.
Maker / Origin
PTP (Unidentified)
Condition & Value
Assuming standard vintage condition based on typical wear for the era. The abalone appears intact, which is crucial as shell inlay is prone to cracking or loss over time.
Full Research
Sold comps, value drivers, and venue guidance pulled from recent auction results.
Mid-century modernist jewelry has a dedicated collector base, particularly for sterling silver pieces. Abalone inlay was heavily used in Mexican silver (Taxco) and broader modernist studio jewelry during the 1950s-1970s. Unsigned or unidentified pieces trade primarily on decorative appeal and intrinsic silver value, moving steadily in the $40-$80 range on platforms like Etsy and eBay, while pieces by recognized masters command significant premiums.
▲ Sterling silver construction provides a baseline intrinsic material value.
▲ Mid-century modernist design appeals to a specific, active collector niche.
▲ Intact abalone inlay maintains the visual impact and structural integrity.
▼ Unidentified maker mark caps the value at the decorative/generic tier, missing out on artisan premiums.
▼ Missing dimensions and weight prevent exact scale assessment, which can affect buyer interest.
▼ Any unverified cracks or losses to the abalone shell would significantly reduce value.
Best Venue
List on a retail marketplace like Etsy or eBay, targeting vintage jewelry enthusiasts. Use keywords like 'Mid-Century Modernist,' 'Sterling Silver,' 'Abalone Inlay,' and 'Studio Jewelry. ' Do not polish heavily, as many collectors prefer original patina, but ensure accurate dimensions and weight are included in the listing.
Upside Potential
If the 'PTP' or 'PJP' script mark can be positively attributed to a recognized, documented mid-century studio jeweler or a known Taxco artisan, the value could shift into the $150-$300 range, aligning with the higher-end artisan comps.
Also found — market-range context
Surfaced during research but not used to anchor the valuation — wrong form, species, era, or no published price. Shown so the market range around this item is visible.