White gold filled case measures 38x22mm. Style 157/8 dates to 1925, the year Gruen introduced the Quadron. Excellent condition case with no personalized engraving, and pierced lugs are not all stretched out. Original luminous dial with some toning as seen. Replacement crown. Replacement acrylic crystal. 15 jewel Grade 157 movement sets and winds properly, keeps time to within 2 min/day at time of listing, but not known when the movement was last cleaned. New 14mm brown leather strap.