Not worth much, send it to me and I'll find a use for it.
actually, hold on to it, research it here (responces will be forthcoming) and where ever else you can, then decide what to do with it, you really have something on your hands. Post up some clear pics of the lug joints, components, and the whole bike, that will help!
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"