Fine and rare Waltham 20/S 18K gold vibrating hairspring stud antique pocket watch
circa 1864.
The balance fitted with a pivoted vibrating hairspring stud to achieve
isochronous performance without the need for a Breguet overcoil.
Heavy hunting case with the engine turning worn off. White enamel dial with hairline
from the bottom of the seconds dial to the 30 minute mark. Gilt 3/4 plate 15 jewel
movement.
