Grip Tester [Try Your Grip] © 1888 Everitt [P. Everitt].
Released in September 1888.
Patented on April 02, 1889 (U.S. Patent No 400,839).
Invented & Patented by : Percival Everitt
U.S. Patent No 400,839
Automatic Pleasures - The History of the Coin Machine - Nic Costa - 1988 - Page 114
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