Pocket watch: museum-like verge watch with calendar and seconds, matching gold chatelaine with 5 pendants, signed Berthoud Paris, 20K gold punch 1774-1780: Ca. Ø41.5mm, ca. 55g, very fine Louis XVI case with lateral hinge, relief decoration in 3 different gold colours, French 20K gold punch 1774-1780, no. 10427, extremely rare early verge movement with seconds and additional indication of day of the week and date, very rare red hour numerals, golden hands, intact and in very beautiful condition, additionally the museum-like gold chatelaine, also worked in green and pink gold, absolutely matching to the front of the watch, equipped with 5 different pendants, including an enamelled seal pendant and an enamelled golden pendant in the shape of a book with concealed secret compartment. Verge watches from this period with calendar and seconds are technically very interesting collector's watches. With the accompanying gold chatelaine, they are museum collector's items. The watch comes from one of the most important European pocket watch collections.