Of General Interest

While starting to get a bit more organized, I ran across an envelope with 4 circuit boards and 4 sets of parts for a BFA1 Altimeter I bought over 25 years ago. The altimeter seems to be a design that a George Brockfisher of Andover MA offered. My problem is I can't find any documentation on the BFA1. I searched the NAR website, The Rocketry Forum, Ye Olde Rocketry, and did a Google search with no luck. Does anyone remember this build or the inventor? I would really like to build these up and try them out. Adding a scanned image of the board:

Guy.