An oxidised and lacquered brass glass plate, circular, artificial horizon signed KEUFFEL & ESSER CO. NEW YORK, with three adjustable levelling screws on ball and socket feet, with associated graduated bubble level in fitted mahogany case - 5½in. wide; a lacquered brass mirror surface, rectangular, artificial horizon signed TROUGHTON & SIMMS, LONDON, with three adjustable levelling screws, with associate graduated glass bubble level with fitted mahogany case with trade label Troughton & Simms Opticians and Mathematical Instrument Makers to the Honourable Board of Ordnance London - 5½in. wide, and a small sized oxidised and lacquered brass station pointer signed H. Hughes & Son 59 Fenchurch St. London No. 543 in fitted mahogany case - 11¾in. wide. (3)