Pair-case watch

Maker: Watchmaker: Thomas Tompion (British, 1639–1713)

Maker: Case maker: Nathanial Delander (British, 1648–ca. 1691)

Date: 1682–83

Culture: British, London

Medium: Outer case: leather with gold studs; inner case and dial: gold with blued-steel hands; movement: gilded brass, partly blued steel, and silver

Dimensions: Diameter (outer case): 2 in. (5.1 cm);
Diameter (inner case): 1 3/4 in. (4.4 cm);
Diameter (back plate): 1 1/2 in. (3.8 cm)

Classification: Horology

Credit Line: Gift of J. Pierpont Morgan, 1917

Accession Number: 17.190.1489a, b


This extraordinary watch records seconds on the subsidiary dial above the number VI on the chapter ring for hours and minutes. It also has a remarkably early stop mechanism that can be activated at will in order to measure short intervals of time. The watch is not numbered on the back plate, but it is numbered 175 on the pillar plate and on the inner case.