An English gilt brass chronometer carriage timepiece, circa 1970s, the four pillar eight day fusee movement with maintaining power, Earnshaw type detent escapement with freesprung helical balance spring and heavy bimetallic balance, the silvered dial signed 'Thomas Mercer', above black Roman numerals, framing subsidiary seconds and state of wind indicator, the tapering case with swing handle above bevelled glass panels to top, front and sides, the solid rear plate with start/stop lever, hand setting and inscribed 'Thomas Mercer, St. Albans, England, Established 1858' above model No. '1172', on bracket feet, height approx 19cm, with original tooled black leather case and winding key.