Russians produced it in two different versions: this, the IN-12B and the IN-12A. Anyway, the unique difference between these two models is the decimal point: the IN-12B has it. It’s a quite common model. In fact, it’s used in a lot of clocks. It’s top view and it has an oval shape.
|symbols||-||0, 1, 2, 3, 4, 5, 6, 7, 8, 9, CL|
|dimensions||mm||21 x 31 x 35|
|cathode current (CL)||mA||0.3|
|cathode current (digits)||mA||2.5|
|temperature range||°C||-60 - +70|
|socket or alternative||-||SK-136, 1.02 mm pins|