Homebrew PCBs

A couple of thoughts and guesses:

I totally agree with the poster who offered that the "board" looks like perforated board (i.e. point to point wiring) not a printed circuit board.  That strikes me as totally consistent with both the date of the design and the "one up" nature of these kind of projects. 

The other thought is to post your question on some ham/amateur radio newsgroup.  I bet you will have better luck, maybe finding someone that owns one.

Steve