Luchs is one of the very rare Sun 3/E. It is a VME-Bus machine. Sun sold the 3/E as naked boards (double eurocard format). The boards could be placed in any ordinary VME-Bus chassis. These were used as processing computers to control machines.
The chassis i use is from Schroff. They sell VME-Bus stuff all over the world.
The following boards are inside:
Sun sold 4 MB and 12 MB memory boards for the 3/E.
If you have one of these and want to get rid of it, feel free to email me!