Swiss lever chronometer with auxiliary seconds Circa 1892

Open faced pocket watch by Patek Philippe & Cie.
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A Geneva lever chronometer with auxiliary seconds, quality EXTRA, circa 1892. Made for Shreve, Crump & Low Co. jeweller and sold on 01/27/1896, with Patek Philippe extract from the archives.
The case is 18 carat gold with a glazed movement. The dial is white enamel with red numerals for the minutes as well as those of the small seconds and decorative gold hands. It has a bridge movement “Extra” and a gold screw compensation balance. Dial and movement signed.
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Diameter: 50 mm
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Weight: 101 g
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Signed: Patek Philippe & Cie. Geneva / Shreve Crump & Low Co., Boston