Here is a list of duplicate manuals I have.  All are originals unless stated otherwise and are in varying states of condition.

Williams

Black Knight
Whirlwind
Disco Fever
Flash - 1 x original and 1 x photocopy
Firepower - 2 x photocopies

Gtb

Charlies Angels
Solar Ride
Sinbad
Hulk
Blue Service manual Solid State Machines - 2nd Edition x 4.  Some are well used.
Jacks To Open

Stern

Cosmic Princess

Bally

An Intro To Bally Flipper Games (EM)
Electric pinball Games Repair Procedures
Wall Street Bingo - has schematics as well
Blue Chip - has schematics as well
Special Force
Lady Luck x 2
Lost World

if anyone is interested in some kind of swap just let me know.