An early Victorian mahogany longcase observatory regulator, Robert Bryson, Edinburgh, circa 1840

13-inch silvered dial with annular minutes enclosing subsidiary seconds dial with astronomer's marks and a double-twelve hours dial, signed Robt Bryson, Edinburgh, the substantial movement with shaped plates and four screwed pillars, deadbeat escapement with jewelled pallets, maintaining power, very high count train, mounted on a cast iron bracket from which the steel flask mercury pendulum is separately suspended, with beat adjustment and silvered beat plaque, the plain case with moulded top and glazed trunk door,

190.5cm. 6ft 3in. high