An early 20th Century Swiss lever with world time indications in a gunmetal open face case. Gilt three quarter plate keyless movement with going barrel. Plain cock with polished steel regulator, uncut bimetallic balance with spiral hairspring. Club foot lever escapement. Unusual white enamel dial, the outer ring of Roman numerals with a finely divided chapter at its inner edge . The enamel centre of the dial rotates with the hour hand and is marked with major cities around the world, those marked in red being behind Greenwich. Blue steel hands, the hour hand to be set by the watchmaker to the owners time zone. Plain open face case with clip on back and bezel, gilt winding button and bow.