Hi,
for me it looks like an 68060 accelerator card with on-board SCSI-controller and three 72-pin simm sockets.
Are you shure it is a prototype ?
The professional look and the label with the barcode suggests me that it is a comercial product. If it was mine, I would plug it into the CPU-socket of an A4000 (remove the motherboard from the case if it doesn't fit) and look if it runs.
Are you shure it is for an A4000 ? It looks as it might fit perfect into an A3000T.
Noster
