A Mahogany Cased Sextant by Crichton Of London with Interesting Provenance ? Thomas Sopwith The mahogany case with brass plaque inscribed: T.O.M. SOPWITH? The brass Sextant inscribed ?Crichton London, Made For D. McGregor Greenock & Glasgow? with various accessories Case Height: 12.5cm; Width: 34cm; Depth: 28cm Note: Sir Thomas Octave Murdoch Sopwith,CBE, HonFRAeS(18 January 1888? 27 January 1989) was an English aviation pioneer andyachtsman and Inducted into the Americas Cup Hall of Fame 1995 https://en.wikipedia.org/wiki/Thomas_Sopwith