Josef Nicolaus, Senftenberg in Böhmen

A SILVER OPEN-FACED CHRONOMETER WATCH WITH SIDEREAL TIME IN ORIGINAL MAHOGANY DECK BOX NO. 27, CIRCA 1900

• Movement: gilded three-quarter plate, Earnshaw type spring-detent escapement, free-sprung bi-metallic compensation balance with gold timing weights, blued steel helical spring, brass collar for winding square, gilt-metal cuvette with aperture for winding, movement and cuvette signed and numbered Jos. Nicolaus Senftenberg in Böhmen, no.27
• Dial: white enamel, outer Arabic minute ring with central blued steel hand, two subsidiary dials for constant seconds and 24-hour sidereal time, blued steel hands, signed Jos. Nicolaus Senftenberg in Böhmen, no.27 and additionally marked Stern Zeit (Sidereal Time)
• Case: plain silver case, case maker's mark FS beneath a crown incuse
• Deck Box: two-tier mahogany deck box with blue velvet lined holder, the lock with key, lacking numbered roundel plaque to lid

diameter 59mm

Provenance:
Time Museum, Rockford Illinois, inventory no.258
Sotheby's New York, Masterpieces from the Time Museum, Part II, 19 June 2002, lot 67