Not sure if this would be possible, but I'd love to see some of the more vintage EMs (1930s - 50s), most notably the Gottlieb woodrail machines.
Examples include:
Ace High (Gottlieb 1957)
Humpty Dumpty (Gottlieb 1947)
Spot Bowler (Gottlieb 1950)
3-D (Williams 1958)
Baffle Ball (Gottlieb 1931)
Marble Queen (Gottlieb 1953)
Gusher (Williams 1958)
Balls-A-Poppin (Bally 1956)
Bumper (Bally 1936)
Examples include:
Ace High (Gottlieb 1957)
Humpty Dumpty (Gottlieb 1947)
Spot Bowler (Gottlieb 1950)
3-D (Williams 1958)
Baffle Ball (Gottlieb 1931)
Marble Queen (Gottlieb 1953)
Gusher (Williams 1958)
Balls-A-Poppin (Bally 1956)
Bumper (Bally 1936)