Chs. Tissot & Fils, "World Time"See previous pageTissot, "Tissonic Electronic F 300". Produced in the 1970's.Amusing center-seconds, tonneau-shaped, stainless steel and yellow gold-plated 20 micron gentleman's electric wristwatch with date. three-body, bicolored, polished and brushed, gold ridged bezel and lugs, steel case back. satiné bronze with applied white and gold indexes with tritium dots, aperture for the date. "Bâton" tritium-coated white hands. Cal. 2010, Lic. Bulova & Pat., diapason tuning fork for swinging element, frequency of 300 Hz.Dial, case and movement signed.Dim. 35 x 40 mm.