Patek Philippe White Gold Perpetual Engraved Ref. 5160

Breguet Yellow Gold Classique Perpetual Calendar Watch Ref. 3050

Patek Philippe Platinum Perpetual Calendar Retrograde Ref. 5059P

Patek Philippe Yellow Gold Perpetual Calendar Chronograph Watch Ref. 2499

Patek Philippe Platinum Perpetual Calendar Watch Ref. 5040

Audemars Piguet Yellow Gold Perpetual Calendar Ruby and Diamond Watch, Likely Piece Unique

Piaget Yellow Gold Perpetual Calendar Watch

Harry Winston Yellow Gold Skeletonized Perpetual Calendar Retrograde Watch