Q: What is a PSP?
A: The PSP is the very first model of the P7 line and is quite rare.
It looks like this:
The PSP was produced from May of
1976 through 1978. Only 239 total models were manufactured. The serial numbers
for the PSP go from 001-239, then 240-250 are for the PSP/P7, and after 251
starts the P7 series.