Case: two body, cushion shaped, snap on case back.Dial: Bi-color, black and white with applied luminous baton indexes, outer minutes/seconds divisions, aperture for the day-date. Louminous baton hands.Movement: cal. 160 with quartz standardization.Dial, case and movement signed.Dial, case and movement in quite good conditionDim: 44x 42 mm. Thickness: 12,5 mmNote: IWC produced two watches with tuning fork movements, made by ESA and based on the Bulova patent. These were the cal. 150 (24,600 made) and the Cal. 160 (6,000 made); both were made in 1971 to 1973. The only real difference between movements is that the Cal. 160 had both day and date wheels, while the 150 was date only. Various different dials and case designs were used.