Pythagore is a watch model name used by multiple companies, often in reference to the so-called “golden ratio”.

Pythagoras is often credited with discovering the Golden Ratio, though it was widely known before him. But this association persisted, as did the belief that the relationship between roughly 1.6 and 1 was a universally-recognized harmonious one. For this reason, many jewelry and watch companies have used this relationship in their designs, from the classic Jaeger-LeCoultre Reverso to today.

The name “Pythagore” has been used in a number of watch models from many different companies

• 1948 Minerva "Pythagore" Cal. 48
• 1958 Minerva Pythagore
• 1984 Eterna Pythagore
• 1985 Ardath Pythagore (circular, square, and rectangular models)
• 2000 Minerva Pythagore 38
• 2016 Montblanc Montblanc TimeWalker Pythagore UltraLight Concept