Here's a Nishiki "Team Issue" made of tange prestige, weight is 21 lbs. Full Dura Ace (6 spd), stock.
I flipped it a few years ago.
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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"