A fine late 19th Century English keyless reverse fusee chronometer by Kullberg with power reserve indication in a gold open face case. Gilt half plate keyless movement with reverse fusee and chain. Harrison's maintaining power. Plain cock with diamond endstone. Compensation balance with white metal helical hairspring. Earnshaw type chronometer escapement with short detent spring. Screwed in jewelling including the arbors of the fusee, escape pivots with endstones. Signed and numbered white enamel dial with subsidiaries for power reserve and seconds, Roman numerals, blue steel hands. Substantial plain 18 carat open face case, gold cuvette with apertures to allow the watch to be wound and set by key if desired. Gold hand set under the back cover which also disables the winding crown when the cover is closed.