GRUEN Curvex Precision 14k white gold gents wristwatch

GRUEN Curvex Precision 14k white gold gents wristwatch, Switzerland/USA around 1940, manual winding, curved snap on case back, two-dimensional glass, silvered dial with applied indices spotty, 1/4 hour-signs at 3, 9 & 12 with in white gold set diamond indices, constant second at 6, lever movement, calibre 440, screw-balance, Breguet-hairspring, diameter approx 22 mm, needs to be overhauled, condition 2-3