G. Billian Fils

G. Billian Fils, Zürich, circa 1900.Very fine, 18K gold, hunting-cased, keyless astronomical minute-repeating watch with phases of the moon, perpetual calendar and chronograph. four-body, "bassine" , back engraved with coat of arms, gold hinged cuvette. white enamel, Arabic numerals, outer minute track, outermost seconds divisions, five-minute/seconds Arabic markers, four subsidiary sunk dials for days of the week, date, months of the four year leap cycle and subsidiary seconds concentric with phases of the moon aperture. "Spade" gold hands.