Large, rare Swiss nickel watch with visible balance Circa 1890

Nickel cylinder watch with visible balance
–
A large and rare Swiss nickel open faced pocket watch with visible balance, circa 1890. Very rare musical movement with a pinned barrel, Patent Brevete 8605, view to the escapement with balance and cylinder escapement. Two coloured champlevé dial with Roman numerals and blued steel hands. Plain case. Case and movement with matching number.
–
Diameter: 66 mm
–
Weight: 267 g
–
Signed: No name