NII-Chasprom

   Hélas, je crains qu'il soit quasi impossible d'en trouver une. A priori, c'est un modèle 24h électro-mécanique fabriqué à 29 exemplaires dans le cadre du programme spatial Soviétique.

http://www.netgrafik.ch/russian_space_watches.htm :

'NII' is an abreviation for something like 'Science Technical Institute'. There was at least 2 'NII's associated with watchmaking.
NII-Chasprom was the most elite Horological institute of the Soviet era, who not only designed and built experimental electronic watches, but also did the certification of marine chronometers. In the early 1960s NII-Chasprom made some 'electronic' watches specifically for use in the space program. The format was 24-hour with date. Whether balance-wheel or tuning-fork is not explained anywhere, but certainly it wasn't quartz, because such technology did not yet exist in wristwatch size. A total of 29 were made. Belyaev allegedly wore one on the Voskhod-2 mission and Artyukhin on the Salyut 3.

http://forums.watchuseek.com/f54/nii-chasprom-electro-mechanical-space-watch-371385.html