Vintage NOS 1960's 18 Karat Yellow Gold and 7mm Goldstone "Venturina" Spinner Pentagon Charm

Vintage NOS (new old stock) pentagon pendant crafted of solid 18 karat yellow gold
Acquired from a jeweler's estate
Item is from the 1960's
Features a 7mm brown goldstone "Venturina" bead which spins
Measures 0.76" x 0.41" (19.6 x 10.3mm)
Not marked, but has been tested for 18K gold content