2SC3198 Korea Electronics, Silicon NPN Epitaxial Planar Transistor,
Vcbo 60V, Ic 150mA, Tc 25°C 400mW, min.80MHz,
Case type: TO-92, 

Marking: C3198, rank GR: hFE 200..400, 
ECB 

Low-Noise, Low-frequency amplifier, 

Complementary PNP 2SA1266