Fairchild KSA733CY 10 pcs per lot.  Low frequency amplifier. 

Collector- Emitter Voltage VCEO Max: 50 V
Collector- Base Voltage VCBO Max: 60 v
Emitter-Base Voltage 5 V
Gain Bandwidth Product fT: 180 MHz
hFE =120-240
Complimentary transistor is KSC945

This device is ECB (collector for center pin, as original 2SA733). Good match for 2SA561 (ecb), 2SA708, 2SA673. See last photo for spec comparison.