Several designs for this clock by Reinhold Vasters are in the collection of the Victoria and Albert Museum, London. These designs include drawings for the entire clock, the figure of Hercules, the band of signs of the Zodiac, the dial, the finial and detail of sickle, moon on reverse, and the base. In addition, there is an alternate design for the clock and the decoration of the dial (E.2865-1919 and E.2867-1919).
A nearly identical figure of Atlas, rather than the lion pelt-clad Hercules carrying the world forms the stem of an enamelled gold and lapis lazuli desk seal, was formerly in the collection of Jack and Belle Linsky (Sotheby's New York, 21 May 1985, lot 115). This seal too was almost certainly designed by Vasters.