Electrode leads: 1 - anode; 2 - comma sign; 3 - number 1; 4 - number 2; 5 - number 3; 6 - number 4; 7 - number 5. 8 - number 6; 9 - digit 7; 10 - number 8; 11 - number 9; 12 - digit 0; 13 - comma sign. Tested, OTK sign, without factory packaging.
The same date of manufacture 3/83.