This online auction has been extended and will begin to close from Wednesday, 29 May at 12pm CEST.
Details
Rectangular-shaped sapphire, old and single-cut diamonds, platinum (French marks), 1920s, signed Coven-Lacloche, maker's mark (Mirra Frères), numbered (partially indistinct)

SSEF, 2024, report no. 137082: Basaltic, indications of heating

Sapphire: for an approximate weight of 2.70 - 3.20 carats
Diamonds: for an approximate total weight of 4.00 - 4.50 carats

Size/Dimensions: 17.0 cm long
Gross weight: 29.8 grams
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