A substantial early 20th Century split seconds chronograph by Nicole Nielsen in a gold full hunter case. Gilt three quarter plate keyless movement with going barrel under a raised section of the plate. Screwed in jewelling. Plain cock with polished steel regulator, diamond endstone. Compensation balance with blue steel overcoil hairspring. Club foot lever escapement, escape and lever pivots with endstones. Signed white enamel dial with split centre seconds chronograph. Subsidiaries for sixty minute record and continuous seconds, Roman numerals, blue steel hands, gilt split seconds hand. Very substantial plain 18 carat full hunter case, buttons in the band for the chronograph and split seconds disabled when the front cover is closed. Plain gold cuvette, maker's mark “RN” in a rectangle and number corresponding to that on the movement.