ok, it is confession time. Since there is very little conversation going on with my post, I doubt that there will be much more. So, I know exactly what this item is. I was just hoping to start a conversation about it to see if anyone else would bite. I am sorry if I ticked anyone off. I did not intend too. I just wanted to see if anyone would recognize it 46 years later. Anyway, when I was an Electrical Engineering Technology student at Purdue University in 1979 and 1980, I designed (from scratch) and built this bicycle computer as my Junior/Senior design project. I still have all my original design notes, schematics, and some spare parts. Everyone in the class had to design and build (with supervision from the faculty) a project in order to graduate. It also had to work (mostly). So the P and M are my first and last initials. I used the computer on a fair number of rides until such time as other companies (Avocet, Cateye, etc) came out with much less bulkier items. I road tested it on the 1980 TOSRV bike ride in Ohio. Attached is a photo of one of my dormitory mates testing the unit on an indoor set of rollers in my Purdue University dormitory room (Harrison Hall).