Silver pair-cased watch with astronomical indications. The matted dial plate is gilded and engraved with cherubs and has two applied silver dials. The lower dial, with blued steel hand, has a pierced centre and indicates the hours. The upper dial comprises a fixed silver ring showing the day of the month with a silver turning disc and pointer inside. The disc has five circles; the outer circle indicates the signs of the zodiac, the second the months, the third and fourth have a series of figures and the fifth shows the length of month. Also shown in separate apertures on the dial plate are indications for day of the week, moon phase and age, and high tides.

Signed 'Nathan Barrow London'on the movement, but partially obscured by the balance cock and silver regulator. These appear to be later than the rest of the watch, which may have originally been made without a balance-spring. Verge escapement and three-wheel train.

Barrow became a Free Clockmaker in 1660, Master in 1689.

Clockmakers Museum No. 60