Totally original inc magnified date acrylic lens, and on original UN bracelet which is fully adjustable, just serviced and lightly polished.
The UN 36000 Hi-Beat Chronometers, used the cal. ETA 2826 as a base, and the finished movement was designated cal. NB 11 QU. It features 25 jewels, a screwless Glucydur balance, a self-compensating flat hairspring, Incabloc shock resistance, and fine regulator adjustment by eccentric screw (reference source: Heinz Hampel’s Automatic Wristwatches From Switzerland, pg 99). The movement also features quickset date and hacking functions.
it was said unofficially that only 1,000 of these movements were produced, though they were placed in a wide variety of case types and styles