Extremely rare ZENITH XL TRONIC Diapason movement from the 1970s, ZENITH cal. 50.0, very precise. Works also with normal modern batteries, a hybrid version of the patented Bulova diapason on 300 Hz (like the Omega F300 Hz). This Zenith has an extremely high quality Swiss made, high frequency movement. Beautiful, with blue dial and silver hands/markers, with tritium on the hands. Original, see UV photos. It has been in a watchmaker's private collection for its entire life and has never been worn! The case and strap have never been polished, they are very sharp, like from the factory. Its design and case make it appear even larger. New battery, rare occasion to have such a difficult to find piece. Brand: Zenith Model: XL TRONIC Condition: New - NOS Ref. 01-0030-510 - 010030510 Case material: Steel. Case diameter: 40 mm with crown - 36 mm excluding crown Lugs: 19 mm Case thickness: 12 mm Strap material: steel Strap length: 23 cm (open) Tracked and insured shipping via courier, 24/48 hours in Europe and 72 hours to the rest of the world. Follow our NO RESERVE auctions on Catawiki and on "Watchamore" Instagram.