Swiss. An 18K gold openface minute repeating keyless lever watch

Swiss. An 18K gold openface minute repeating keyless lever watch
Unsigned, retailed by E. Sommer, Mexico, case no. 5964, circa 1910
Nickel-finished lever movement, 29 jewels, bimetallic compensation balance, minute repeating on two hammers onto two gongs, gold cuvette, white enamel dial, Arabic numerals, outer railway five minute divisions, subsidiary seconds, plain circular case, engraved initials to the back, repeating slide in the band, cuvette signed
53 mm. diam.