A jewelled two-colour gold-mounted guilloché enamel hat-pin

Arthur Bowe, managed Fabergé's Moscow branch, with his brothers, Alan and Charles, until he left to establish the London branch in 1903. In 1906 the Bowe brothers left Fabergé and from 1908, Arthur Bowe ran Noble & Co, London.
(G. von Habsburg, Fabergé Imperial Craftsman and his world, London, 2000, p. 324.)