The Property of a Lady and a Gentleman, A mahogany 1-day marine chronometer, No 419, John Roger Arnold, London

2¼-inch enamel dial with subsidiary seconds dial, gold hands, the fusee movement with Arnold detent escapement, later bi-metallic compensation balance and blued helical spring, signed on the backplate Jno R Arnold Inv et Fecit, No. 419, the brass bowl gimballed in a baize-lined three tier mahogany box with brass handles and inset with two ivory roundels inscribed Arnold One Day and 419

Antiquarian Horology,  Number 6 Volume 9, March 1976, Page 659

Dial and hands in good condition. Movement will require clean and overhaul, has later alterations to balance and spring, mainspring possibly un-hooked or broken and needs attention. Case in generally good original condition, top front of lid is unglued but we have it, old marks scuffs and scratches throughout. With a later winder and case key.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. All dimensions in catalogue descriptions are approximate. Condition reports may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome. Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. Please note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and leather bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

**Please be advised that bands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping.

Important Notice regarding importation into the United States of Rolex watches
Sotheby's cannot arrange for the delivery of Rolex watches to the United States because U.S. laws restricts the import of Rolex watches. The buyer or a designated agent may collect the property in the country of sale."

John Roger Arnold, son of  John Arnold the great chronometer maker and inventor, was born in 1769 and apprenticed to his father in 1783. He became Free of the Clockmakers' Company in 1796 and in the following year he joined his father in the firm of Arnold & Son. Following the death of John Arnold in 1799, John Roger continued the business on his own becoming Master of the Clockmakers' Company in 1817.  Between 1830 and 1840 he went into partnership with Edward John Dent and after his death in 1843 his business was bought by Charles Frodsham.  No. 419 is first recorded in the Astronomer Royal's list of Government timekeepers in 1821, a note stating that it had been purchased before 1818.  It was used aboard a number of ships but appears to have been regularly returned to the makers for attention, not least in 1827 when aboard HMS Sybille it stopped at sea during a voyage to Accra. It appears to have continued to cause intermittent problems because the records state that in September 1838 it was fitted with a new balance and spring. This would appear to have solved the previous problems as, apart from routine servicing, it continued in service until it was removed from the books in June 1886.