Ring Pull. London: Jon Martin, ca. 1940. Silent, strong, finely made device assists in the vanish or a borrowed ring from between the hands, or even a metal birdcage. Alligator-type clip screws to cable; object to be vanished may be locked into its ?jaws" for vanish. Dural aluminum construction. Hallmarked ?JM." Working. Considered the best device of its type ever manufactured.
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