I have been corresponding with a fellow AIM user
and he had never heard of the Seawell group up in Seattle in the late
1970's so I put up a couple of scans of their offering on this site
One of their more humerous product titles was
their Little Buffered Motherboard. It is a great product and I
still have two of them for using their Prommer II and their RAM/ROM
expansion. Unfortunately, I didn't retain their disk system as it
was quite a luxury to have one of those back then!