Spirit Lock. European [?], ca. 1920s. Oversized hammered bronze lock is displayed and locked. At the command of the performer, the lock, which hangs from a chain wrapped around its hasp, then visibly and instantly opens as if an invisible key had been inserted into it and turned by a ghostly hand. 5 ? x 4 ? x 1?. Face plate removable to expose mechanism. Includes two specially made keys. A trick featured in the shows of Charles Bertram, Karl Germain, and others. The first example we have seen manufactured in this form.