Pair-cased verge watch

Gold watch in horn-covered gilt copper alloy case. The watch is signed ‘Spencer & Perkins Londres’. It was presumably intended for the Spanish market, as the regulator is inscribed with abbreviated Spanish words for ‘advance’ and ‘retard’.
The inner case bears the hallmark for 1806 and the maker’s marks ‘TC’ and ‘RC’ for Thomas and Richard Carpenter of 5 Islington Road.
The outer case is horn, reverse-painted on the underside with a port scene in a floral border (which may well be identifiable). The windows of the house and the bows of the vessel are highlighted in gold, as is the inner border.