Been looking at germanium transistors data orft the Net today, seems pretty much most of the small signal ones are all pretty similar, main differences being max. frequency of operation (interesting that e.g. OC70 & OC71, for "Audio Amplifiers", are 15 kHz and 11 kHz respectively! )
Also Vce Volts, and much over 15V is unusual, be warned; and current / power rating.
Min. Hfe typically tends to hover around 50-ish, but can be as low as 15 - 20.