I don't know which computer was used but:
- It is a serial card
- It has a 50-pin card edge connector (Lisa, maybe?)
- It has RS-422 line drivers (so, it seems to be connected to a
Macintosh)
- It is NOT an apple // card, although having 50-pin card edge connector
(I tried to reverse the pinout but got also no good result)
- It is NOT an apple //e expansion card, that one you put on the
80-column slot. Even reversing the pinout
So, it is probable it is used in a Lisa or a Macintosh XL (same
machine?)
Greetings from Brazil
Alexandre Souza, PU1BZZ