Materials and Features:

• Premium Marbled Tortoise Rhodoid Matrix: High-density vintage French cellulose acetate compound formulated with an optical-grade translucent amber core. The base material is suspension-infused with multi-tonal orange, deep red, organic brown, and black filaments, mimicking luxury natural tortoiseshell with exceptional light transmission.

• Industrial Gadroon Twist Architecture: Features a heavily stylized, integrated 8mm thick mechanical ribbed-twist exterior motif. The graduating high-point ridges capture and radiate a brilliant fiery orange glow when exposed to a direct light source.

• Three-Segment Slide-Action Tooling Fingerprints: The interior wall preserves a complex, historic industrial cross-hatch blueprint. One continuous horizontal center seam runs completely around the inner core, cleanly intersected at 180-degree intervals by two vertical cross-fuse lines, serving as a mechanical testament to the multi-part sliding steel die system used to cast the external ribs.

• Authentic Compression Stress Blanching: Displays microscopic whitening and faint, cloudy-white contact tones localized strictly along the sharpest tips of the external ribbed peaks. This physical state is a textbook polymer reaction known as stress blanching, caused by historical handling and contact impact over decades of use.

Type: High-dome continuous fashion bangle bracelet with an integrated mechanical gadroon texture, engineered as a slip-on solid loop.

Age/Origin: Circa 1950’s / Oyonnax, France (Rhône-Alpes Plastics Basin)

Marks: Attributed Tier (Unsigned regional workshop masterpiece; verified via the distinct 39.4g mass metric, complex three-part sliding mold layout, and signature mid-century technical polymer density).

Other: Successfully passed strict archival verification screenings, showing a completely negative chemical reaction to Simichrome testing and producing zero phenolic or camphor odors under localized thermal testing, confirming a non-degraded, structurally stable mid-century cellulose polymer matrix.

Measurements:

• Weight: 39.4g (Exhibits a solid, premium hand-heft and a high-resonance acoustic "clank" distinct from lightweight acrylics)

• Dimensions: Width: 1.0" Wide (25.4mm) | Cross-Sectional Thickness: 8mm Ribbed Dome Peak | Inside Opening Diameter: 2.675" (Standard comfortable vintage fit)

Condition: Very Good to Excellent vintage condition showing clear signs of authentic history and wear. The high-gloss sheen remains beautifully preserved and uniform across the multi-tonal tortoiseshell surface. The internal wall features a small section of the horizontal seam that can slightly be felt with the finger, representing an authentic variation in the original factory mold alignment. The sharpest exterior rib tips display localized micro-whitening from stress blanching consistent with aging and banging around over time. The bangle is structurally immaculate, completely free of modern chips, cracks, or post-market structural losses.