Large keyless (openface set) half plate movement jewelled to the centre, with cap jewels on balance, lever and escape, the hollow-back frame numbered 9946 and the top plate also engraved PARTLY SWISS, complete with both polished steel gongs. Single-roller detached lever escapement. Compensation balance, balance-spring with double-overcoil. Lovely signed snap-on enamel dial, the rear signed WILLIS (partly obscured), original blued-steel hands. 44.4 mm diameter, 9 mm deep, not including centre arbor.
The firm of M F Dent one of the leading London based watch, chronometer and clock retailers of the period – see the book on Edward John Dent and the various Dent firms by Vaudrey Mercer. NB: Mercer lists this movement as having been supplied by Nicole Nielsen and it bears what I believe is their serial number: 9946. If so, it is not their own caliper of repeater and will have been finished by them from an imported Swiss movement. It is, however, a finely made top quality movement and has typically English rocking-bar keyless work.
Nicole Nielsen were the foremost London watchmakers of the second half of the 19th and early 20th centuries, supplying many of the finest watches to retailers such as Frodsham, Dent, Smith & Son, etc. They manufactured their own caliper of movements as well as doing finishing work on those supplied, as here.
One small blemish to the otherwise perfect condition dial, and all rather dusty. Not cleaned by me but will tick happily if pressure is applied to the train. The slide-activated repeat is also working, although the quarters not always on both gongs.