The first mechanical slot machine was the Liberty Bell, invented in 1895 by Charles Fey, a San Francisco car mechanic. Fey's slot machine had three spinning reels, with diamonds, spades, hearts and one cracked Liberty Bell painted around each reel. Three bells in a row produced the biggest payoff, a grand total of fifty cents or ten nickels. The original Liberty Bell slot machine can be found at the Liberty Belle Saloon & Restaurant on 4250 S. Virginia, Reno Nevada. Source "Mark Pilarski's Gambling Column"
Adobe Illustrator. Information from inventors.about.com