ENGLAND, mid-20th century Thomas MERCER. Marine compass or chronometer, for the ''Centenary of 1858-1958''. With two-day reserve, gold-patinated brass case and gimbal. Silvered dial, signed and numbered "27710", hour markers with Roman numerals and minute scale in black. Bezel and movement rabbet with the same number. Spiral, fusee and chain movements. Varnished wooden case, with top glass and oxidized brass plate engraved "N.V. Observator Westzeedijk. 52 Rotterdam C. N° 22710". Case diameter: 13 cm. - Case: 17.5 x 18.5 x 19 cm. Missing winding key. Minor oxidation and scratches to brass parts and rubbing to dial. Minor pitting to the plate. Scratches and bumps to the case.