The movement of the present watch would have been supplied by Bonniksen and then finished and adjusted by Birch & Gaydon. Bahne Bonniksen, (1859-1935) is listed as working at 16 Norfolk St., Spoon End, Coventry. Bonniksen was born in Denmark and completed his horological apprenticeship under T. D. Wright in London, Wright was later appointed lecturer at the Northampton Polytechnic, London, for his work on the theory of chronometer manufacture. After completing his apprenticeship Bonniksen moved to Coventry where he set up his workshops. In 1893 Bonniksen made an application to the British Patent Office for his Karrusel regulator. In November of the same year he was granted Patent No. 21421 for this invention. At the height of production, several watchmakers in Coventry made watches with his regulator under licence and no less than 500 watches per year with Bonniksen Karrusel regulators were submitted to the Kew Observatory in Teddington for certification. Otto Sverdrup, captain of the ?Fram? and legendary Arctic explorer, said of the Bonniksen Karrusel upon returning from his expedition to Greenland (1898- 1902): "the Karrusel in question has followed me on all sledge expeditions during these four years, and it has always proved to be one of the best pocket chronometers on board". Bonniksen went on to become Horological Instructor at the University of Coventry, and his patent and workshops were sold to the Rotherham watch company. Birch & Gaydon First listed at 173 Fenchurch St. London, (1861-1875) then at 153 Fenchurch St London until 1921. The firm was founded when William Birch took over the workshop of William Turner in Fenchurch St. Peter Gaydon was taken on as a partner in 1874 and the firm went on to supply pocket and deck chronometers to the English Admiralty from the circa 1900. They were one of the most renowned watch makers in the city of London at the end of the 18th and beginning of the 19th centuries and are now owned by Aspreys of Bond St.