Not prototypes, but somewhat rare original Diamond Plate playfield machines - FH and BOP
DP Machines.JPGFunhouse DP.JPGBOP DP.JPG
No, the WW to the right isn't Diamond Plate... but if anyone has one they're selling, let me know.
P.S. After taking these photos... Now realizing how dusty the playfields look! I'll have to get on that ASAP.