Jas. McCabe, 15509: An interesting 18ct gold open-face pocket chronomter in engine turned case, the silvered dial with Roman numerals, subsidiary seconds and gold halberd hands, the frosted gilt half-plate fusee movement with visible Earnshaw spring detent escapement, freesprung bimetallic balance with blued steel helical spiral and diamond endstone, raised spring barrel housing, the dial and movement signed Jas. McCabe, Royal Exchange London, the case also numbered and with the makers stamp IMC and hallmarked London 1849, in brass strung rosewood travelling box with sliding observation lid, spare signed and numbered dial and glass