Resurrection Watch.
Reading edition
During the reign of Catherine II. of Russia, Kalutin, a peasant, made a musical repeating watch about the size of an egg, which had within it a representation of Christ's tomb, with sentinels on guard. On pressing a spring the stone would be rolled from the tomb, the angels appear, the holy women enter the sepulchre, and the same chant which is sung in the Greek Church on Easter eve accurately performed. The watch is now in the Academy of Sciences at St. Petersburg.