Swiss Watch Fair 1970 BF 70
This high frequency watch (281800 vibrations per hour) incorporates a noteworthy technical innovation. The centre arbor and cannon pinion are protected by a microscopic hall bearing (total Ø 2,2 mm) to withstand the barrel ’ s high torque T eli winding watch with day and date calendar. Water-resistant case. Scratchproof sapphire crystal. (CERTINA 288)