Moonphase calendar pocket watch, Swiss ca. 1900

the white enamel dial with Roman numerals has a set of black steel hands and subsidary dials for day of the month, month of the year, say of the week and phases of the moon. Metal case. The watch is stem wound / pin set. Cylinder movement. Diameter 50 mm. Weight 109.42 g.
Item condition grading: **** good.
The watch seems to be in working order but may need an overhaul.