Yanka Quartz caliber 3050, also known under the names 'Slava', 'Luch' or 'Ruhm'. The first Russian quartz watch, caliber 3050, that was brought on the market around 1980 with a tuning fork shaped quartz of 9,720 Hz. The watch was equipped with a stepping motor and a hybrid circuit, mounted on a plate made out of pertinax.