Unusual Swiss niëllo retrograde lever sector watch Circa 1905

Niëllo open faced sector watch by Record Watch Co. 
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An unusual Swiss niëllo open faced retrograde keyless lever sector watch, circa 1905. Oval shaped gilt finished jewelled lever movement. Inscribed silver cuvette. Oval shaped white enamel dial, fan form retrograde Arabic hour numerals and black and red Arabic minute divisions. Fan shaped polished niëllo case, the back cover with foliate design, polished monogram plaque, bezel and band with niëllo foliate design, scrolled shoulders at the crown, entwined bow, hinged back. Movement signed Record Watch Co, cuvette and dial signed Sector Watch, case numbered.
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Width: 59.5 mm
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Signed: Record Watch Co S.A. Sector Watch Tramelan