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On Portable Watches – Overcoil

On Portable Watches

Godfrey William de Leibnitz, Phil. Trans., London, 1675. A new invention of a Clock descending on an Inclined Plane. M. de Gennes,

On the Construction and Management of Chronometers

E J. Dent. 8vo, London, 1842.

Traite d'Horlogerie. Louis Moinet, Paris, 1843.

Oilstone Dust

A preparation of powdered oilstone, used for smoothing pivots and other steel parts.

Overbanking

When the balance vibrates excessively and causes the ruby pin to push past the lever, it is known as overbanking.

Overcoil

The last coil of a Breguet hairspring, where it is bent over the body of the spring towards the center, is called the overcoil.