Guilloché Centre
World Time 2523 — Guilloché Centre
Plain guilloché centre radiating from the middle – the pattern later revived on the 5110.
Patek puts the 2523 and 2523/1 together at under 40 in yellow gold, over 10 in pink gold and one in white gold (Revolution); about 45 in all (Sotheby’s via Collectability); about 29–36 of the 2523 in two batches (Phillips).
Identifying details
- Guilloché dial
Engine-turned (guilloché) dial or dial centre.
- World time
Louis Cottier’s heure universelle display: a 24-hour ring read against the names of cities in all time zones.
Variants of 2523
Reference overview →| Variant | Production |
|---|---|
| Guilloché CentreCurrent | Undated |
| Cloisonné Enamel Centre | Undated |
| Cloisonné Enamel Centre · White Gold, North America Map | 1955 |
| Royal Blue Enamel Centre | Undated |
Case & movement
- Reference
- 2523
- Production
- Undated
- Case diameter
- 35.5 mm
- Movement
- Manual winding
- Date
- No
- Caliber
- Patek Philippe 12-400 HU
Dial, bezel & hands
Unknown attributes are left out rather than guessed.
Movement
Patek Philippe 12-400 HU
Cottier’s second world-time system on the 12-400: a second crown at 9 turns an inner city disc under the crystal, protecting the city names from wear. Used in the refs. 2523 and 2523/1; Cottier’s monogram and the movement number appear on the main parts.
Manual winding · Introduced 1953 · 18 jewels