Case material: Yellow gold; Charge: Manual; Conditions: New Year : 1950; Presentation condition : With boxes and all papers; Model: calendar perpetual Price on request Gmtbroker Reference: nessuna Perpetual Calendar 1526 - Modèle or jaune 18K fait pour "Guillermin", cadran blanc à index or jaune, jour, date, mois, phases de lune, remontage manuel / Yellow gold 18K made for "Guillermin", white dial with yellow gold indexes, day, date, month, moon phases, mechanical movement. Montres appartenant à une collection, uniquement sur rendez-vous / Watches belonging to a collection, by appointment only.