It's an original "pre-luber"...
http://www.pre-luber.com/index.htm
I got the marine version back in 1995 and had Marc H install it. He wired it to the ignition so when you turn it forward to accessory the pump runs, once I have pressure on the gauge I turn the key forward to the start position and the pump automatically cuts out and the engine fires immediately and runs smooth as can be. Haven't had any problems as is usual with all work done by the "ZR-1 Specialist". Another benefit of a smooth start is no rough idle tranny rattle due to the fidanza.
If I get a chance tomorrow I'll post a few pictures.