Ladies Irish Harp Watch. Gold plated, dust proof case, gold printed dial, black leather band, quartz movement. Diameter size: 1" (25mm.) The Irish Harp (Clairseach) From the 11th century to the end of the 17th century, the harp strings were heavy brass and had 7 notes to the octave. The modern gut strung harp produce a full chromatic (12-note) octave with the help of turnable hooks at the top of each string.