A 20-ct gold triple-cased pocket watch signed on the dial and the backplate J.P. Kroese Amsterdam, c.1760. The outer repoussé case depicts King David playing the harp at the palace of King Saul. The plain inner case has a maker's mark IL for Jacob Losberg and is hallmarked with the year letter for 1761. The white enamel dial has an unusual aperture showing part of the balance, a so-called false pendulum. The dial has Roman hour numerals and outer Arabic five-minutes and minute divisions. The time is indicated by two blued-steel beetle and poker hands. The full plated gilt brass movement has finely engraved decorations on the backplate, with the signature and address; it has verge escapement and chain fusee. The watch has a protecting case, covered with shagreen leather. • Diameter, incl. protecting case: 62mm. • Literature: E. Morpurgo, Nederlandse klokken en horlogemakers vanaf 1300, Amsterdam, 1970, p. 74.