Golden Ratio, Refined — A Design Icon by Patek Philippe mid 1970s

Perfectly poised between round and rectangular, the Patek Philippe Ellipse has long been revered as a masterclass in proportion. This Ref. 3545 from the 1970s exemplifies the model’s architectural elegance — with its harmonious 18k white gold case and a stunning blue guilloche Sigma dial that radiates understated brilliance.

Powered by the ultra-thin, hand-wound Caliber 23-300, this Ellipse represents Patek Philippe’s commitment to pure mechanical beauty beneath an artful exterior. The Sigma signature at 6 o’clock confirms the use of solid gold dial — a quiet detail appreciated by seasoned collectors.

With its minimalist charm, flawless dial, and original Patek buckle, this piece is more than a watch — it's a statement in balance, restraint, and timeless design language.

- wrist size in our picture is 18cm circumference -

• excellent overall condition, showing very minor traces of use
• 3- body 18k white gold case with snap-on caseback
• 32 mm (without crown) / 33 mm (lug-to-lug) / 17 mm (between lugs) / 6 mm thick
  
• reference: 3545
• year: 1974-1975
• total weight: 38 g

MOVEMENT:

• Patek Philippe Cal. 23 - 300 - manual wound
  
• 18 jewels, 18000 A/h, 46 hours power reserve
• professionally serviced 01/2026
• +2 sec/d / 230°

BOX & PAPERS:

• GOLDAMMER certificate of authenticity & service documentation card
• GOLDAMMER box

GOLDAMMER REFERENCE: #1364