A large Swiss lever in a heavy silver open face case made for the American market. Full plate damascened nickle keywind fusee movement with going barrel. Plain cock marked “Fully Ruby Jewelled”. Long polished steel regulator, gold sector index. Compensation balance with blue steel spiral hairspring. Club foot lever escapement visible through an aperture in the plate, screwed in jewelling. White enamel dial with subsidiary seconds, Roman numerals, blue steel hands. Substantial plain silver Keystone open face case marked “Coin”, gold hinges. Large vacant shield shaped cartouche on the back cover, wound through the silver cuvette.