RF or even switching transistors like the 2N2222 can be used in this circuit. The capacitors are ceramic and the frequency is determined by the crystal.
CTS IoT Quartz Crystals Available through Mouser Electronics, CTS quartz crystals are especially suited...
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
Microsemi Le87536 Dual Differential Amplifier Microsemi / Microchip is making available through Mouser...