Large German silver open faced lever pocket watch Circa 1900

Silver Glashütte watch 
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A large silver open faced Glashütte manual wind pocket watch made by A. Lange & Söhne, circa 1900. The lever movement with a DUF caliber. White enamel dial with Roman hour numerals, an outer minute track, sunk subsidiary seconds at 6 o’clock and blued spade & whip hands. A plain case. Dial and movement signed, case signed and numbered.
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Diameter: 58 mm
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Signed: Deutsche Uhrenfabrikation Glashütte i/SA A. Lange & Söhne
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Deutsche Uhrenfabrikation, often abbreviated as DUF, is a historical brand and quality designation for pocket watches, introduced in 1878 by the renowned manufacturer A. Lange & Söhne in Glashütte. The brand was founded to offer sturdier, more affordable pocket watches that nevertheless met the high quality standards of Glashütte.