I just back from a pick up trip (got a lovely little HP110 with diskdrive, printer and all sorts of extra’s). When the previous owner learned I was a collector he gave me a small box of random 30pin ram sims... and this thing. It’s a 3 byte (yeah, 3 times 8 bits) memory card from some ancient computer. I’m not sure from what system this module is, but it’s one of the best extra’s i’ve ever got with a pick up.