細節
                                        
                                            Jules Jürgensen. A fine and rare 18K gold openface two train independent centre seconds keywound watch with flying fourths seconds
Signed Jules Jürgensen, Copenhagen, No. 9885, manufactured in 1862 
Cal. 19''' nickel-finished two train lever movement, 28 jewels, bimetallic compensation balance, gold cuvette with engraved inscription Made to the Order of Commander Vanderbilt. A.D. 1863, the white enamel dial with Roman numerals, outer red and black five minute divisions, blued steel moon-style hands, independent centre seconds, subsidiary dial for flying fourths seconds, both activated/stopped by depressing a button in the pendant, in circular engine-turned case, case stamped and numbered, cuvette and movement signed and numbered, dial signed
48 mm. diam.