Patek Philippe & Co, for N. Matsons & Co Chicago, an eighteen carat gold pocket watch chronograph slpt Signed Patek Philippe & Co, for N. Matsons & Co Chicago, case and movement number  66004, 1885 Manual winding, enamelled white dial, black arabic and roman number,  black graduation, split-second chronograoh with subsidiairy dial for seconds and minutes, diam. 49 mm, with the extract of the archive bougth 19/10/1886 (damage to the dial )