English gold half hunting cased lever chronograph Circa 1911

Gold chronograph with register by Dent
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A very fine English 18 carat gold half hunting cased keyless lever pocket watch with chronograph and register, Hallmarked London 1911. Frosted gilt half plate movement, 15 jewels, going barrel, lateral English lever escapement, cut bimetallic compensation balance with gold timing and temperature adjustment screws, blued steel Breguet balance spring, diamond endstone, index regulator, Nicole Nielsen chronograph work mounted on the backplate activated by a button in the band. Hinged gold cuvette. White enamel dial with Roman numerals, outer minute track and concentric fifths of a second track, Arabic five minute/seconds numerals, subsidiary seconds at 9, 60 minute recording dial at 3 and original blued steel spade hands. Polished case, master mark RN, hinged and sprung front cover with blue enamel Roman chapter ring, thief proof swivel bow. Dial and movement signed.
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Diameter: 54 mm
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Signed: Dent 34 Cockspur St. London
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This watch bears a secure chronograph system: in order to activate the chronograph, the user first must open the front cover in order to unlock the chronograph button in the band. 
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Dent. A celebrated watchmaking dynasty founded by Edward John Dent (1790-1853), known for high quality watches, clocks, chronometers and regulators. After starting life as a tallow chandler, Edward John Dent switched to watchmaking. From 1815 to 1829, he was employed by the Vulliamys and the Barrauds. In 1830 he entered into a partnership with J.R. Arnold. In 1840 he set up on his own account at 33 Cockspur Street, London. He was the builder of ‘Big Ben’, the famous Westminster clock. He made many fine chronometers and watches as well as others of a high commercial grade. The firm continued until relatively recently at 41 Pall Mall, London, as E. Dent & Co. Ltd.