Vintage Niels Erik From Chrysoprase Ring Sterling Silver Danish Scandinavian Modernist

Vintage Danish modernist ring by Niels Erik From, set with an oval green chrysoprase cabochon.
The elongated sterling-silver setting has a dark oxidised recess around the stone and a broad silver frame. 
The internal stamp reads:
STERLING
DENMARK
N.E. FROM
925 S

Measurements
Overall frame: 3 × 1.4 cm / 1.18 × 0.55 in
Chrysoprase cabochon: 2 × 1 cm / 0.79 × 0.39 in
Weight: 7 g
Ring size: EU 52, UK size: L½, US size: 6
Inner circumference: 52 mm / 2.05 in

Condition: Excellent vintage condition. The chrysoprase appears secure, with no chips. The silver has not been heavily polished, preserving the vintage patina.