A RARE GOLD FREE-SPRUNG OPEN-FACED KEYLESS LEVER MONTRE-A-TACT 1885, NO. 1/3097

• gilt three-quarter plate movement, lever escapement, free-sprung bi-metallic compensation balance, the à tact mechanism visible to the back-plate and linked to motion work of the hands • white enamel dial, Roman numerals, outer minute track, subsid