M. F. Dent and Co
of 34 Cockspur St, London, chronometer, clock and watch makers
1856 Richard Edward Dent died intestate; presumably his widow, Marianna Frederica Dent, continued the business at Cockspur Street under her initials.
1860 Business advertised - watchmaker[1]
1861 One of the successor businesses of E. J. Dent and Co
1862 Frederick Knudsen, in the employ of M. F. Dent, of 33 and 34, Cockspur-street, Charing-cross, gave patent notice in respect of the invention of "improvements in chronometers."[2]
1870 John Smith, Manager to Messrs. M. F. Dent and Co., Chronometer, Watch, and Clock Makers, of Nos. 33 and 34, Cockspur-street, Charing-cross, gave patent notice in respect of the invention of "improvements in instruments for timing ships'logs."[3]
1892 M. F. Dent held the Royal Warrant for chronometers[4]
1905 By appointment to the late Queen Victoria[5]
1906 address as above [6]
1913 The name of the business was M. F. Dent[7]
1915 The name of the business was M. F. Dent[8]
1916 address as above [9]
1920 Absorbed into E. Dent and Co