first automatic perpetual calendar - excerpt from archive
Manufacturer: Patek Philippe
Model: Perpetual Calendar
Reference: 3448
Functions: date - day of the week - month - screwed-on caseback
Intricacies: perpetual calendar - moon phase
Material: Yellow Gold
Carat: Gold 750 : 18 ct
Dial: silver
Watch glass: acrylic crystal
Delivery Contents: Papers - Certificate Of Origin
Bracelet: leather
Type of clasp: pin buckle
Diameter: 38mm
Caliber name: Patek Philippe 27-460 Q
Movement type: automatic
Year of Manufacture: 1973
Overall condition: 9 - has rarely been worn - top condition
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