Fully tested, SSI LC PDS 10base2 (Thin) ethernet card. This 3rd party card will work in any Macintosh with the Apple ethernet network drivers installed and an LC Processor Direct Slot (LC PDS).
Note that thin ethernet networks require termination with a 50ohm BNC terminator at each end of the chain (unless the last node is an Apple AAUI transceiver which self terminates).