Lot Essay
For other examples of self-winding watches with round oscillating weights see The History of the Self-Winding Watch by A. Chapuis & E. Jaquet, pp. 171-177.
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UNSIGNED, DIAL SIGNED NON PLUS ULTRA, CIRCA 1830
Details
Anon. An unusual silver openface self-winding independent centre seconds watch with up and down indicator
Unsigned, dial signed Non Plus Ultra, circa 1830
The full plate gilt-finished movement wound by a round oscillating weight, the white enamel dial with outer Arabic five minute divisions, sweep centre seconds, centred by inscription Non plus ultra, eccentric small hour dial with Roman numerals, fan-shaped up and down indicator, in circular plain case with ribbed band, unsigned
52 mm. diam.
Unsigned, dial signed Non Plus Ultra, circa 1830
The full plate gilt-finished movement wound by a round oscillating weight, the white enamel dial with outer Arabic five minute divisions, sweep centre seconds, centred by inscription Non plus ultra, eccentric small hour dial with Roman numerals, fan-shaped up and down indicator, in circular plain case with ribbed band, unsigned
52 mm. diam.