As a long time employee of HP, I have a passing interest in some of the old HP lab/test equipment. Yesterday while wandering through my favorite electronics store (Vetco), I found an old HP 202C Low Frequency Oscillator priced at $14.99. Needless to say, I brought it home. Here is
a link to the HP 202C/CR manual.
The unit is in pretty rough shape, as you might imagine, but it appears to be restorable. I'll post pictures later.