Derek Pratt

Derek Francis Pratt FBHI (9 May 1938 – 16 September 2009) is one of the most important and undersung watchmakers of the 20th century — ranked by those who knew him alongside George Daniels, Philippe Dufour, and Daniel Roth. A true historian of the craft, he drew inspiration from Breguet, Harrison, and Tompion, hoping to carry on the tradition that these early masters had established. He began his career as a restorer working on complex historical timepieces brought to him through antiques expert Peter Baumberger. When Baumberger acquired the 18th-century Danish brand Urban Jürgensen und Sønner in 1979, Pratt joined in 1982 as consultant and technical director — a role he held until 2005. Expert Helmut Crott later noted that Pratt's extraordinary skill was almost certainly the key factor in Baumberger's confidence to complete the acquisition. Pratt's work at Urban Jürgensen — completing 90 historic movements, and creating extraordinary new pocket watches including an oval tourbillon — was pivotal to the brand's revival with collectors through the 1980s and 1990s. He also collaborated with George Daniels on the co-axial escapement. His independent creations include an oval wristwatch in the style of Breguet — his fascination with oval pocket watches inspired by childhood memories of oval tins and the Breguet oval No.

2667 — and an unfinished remontoir wristwatch with flying mainspring barrels and dead seconds.

Prix Gaïa laureate 1999 (artisanal creation). The pinnacle of his life's work: in 1997 he began researching and building a working replica of John Harrison's H4 marine chronometer — the most historically significant watch ever made. He died in 2009 before its completion; Charles Frodsham & Co. finished it in time for the 'Ships, Clocks & Stars' exhibition at the National Maritime Museum in Greenwich in 2014. In a nine-day static test, the replica achieved ±2 seconds/day — within the ±2.8 seconds required for the original Longitude Prize. A loan display exists at the Science Museum in the Worshipful Company of Clockmakers exhibition. Rarely seen at auction; virtually forgotten outside collector circles, yet irreplaceable to the history of English watchmaking.