[Mondial]

A lot of times you can replace the Ge transistors with modern silicon PNP's if you take into account the different Vbe for biasing. Sometimes it's a drop in replacement. A common audio silicon like a 2N5087 usually has better freq response (Ft cutoff freq) than most early Ge RF transistors, and lower noise in addition.

Motorola did a lot of this type substitution in its two-way radio designs from the 60's when they continued to manufacture them into the 70's.