Interesting...

[Silvio]

After having mastered the fabrication of the ferromagnetic balance-spring in the 1990s, Rolex developed and patented a balance-spring made of a new alloy called Parachrom®. Composed of niobium, zirconium, and oxygen, it has the advantage of being up to ten times more resistant to shocks, and insensitive to magnetic fields.
The research and development work took five years and required the creation of the most advanced techniques. Rolex used its own high-tech methods to create Parachrom® in order to ensure perfect quality, while maintaining complete independence. Unwound, the balance-spring is as fine as a human hair. It is like a 20 cm long ribbon, with a rectangular cross-section of 45 µm x 150 µm (microns). Its fabrication starts by the fusion of niobium and zirconium at a temperature of about 2,300 °C in an oven with electronic bombardment, which was elaborated specifically for this application. A bar measuring 30 cm long and 10 mm in diameter is obtained, which then undergoes a series of operations to create a wire that is 3 km long and 0.1 mm in diameter (the diameter of a hair). Next, the wire is transformed into a long ribbon with a rectangular cross-section that is cut into lengths of 20 cm. Each length is wound into a balance-spring, with its shape fixed by a high temperature thermal treatment in a vacuum.
In 2000, the Parachrom® balance-spring was introduced in Rolex’s Cosmograph Daytona, followed in 2005, by its placement in the brand’s new GMT-Master II. Its blued colour pays homage to the prestige of the watch, and reinforces the stability of the balance-spring’s properties. In fact, in the history of watchmaking, blueing a balance-spring was reserved for the most precise and most exclusive timekeepers.

[SPACE-DWELLER]

Nice one!

The PB hairspring is inside the Daytona Cal. 4130 mvt. also really does seem to improve the precision

0 secs deviation the first day!

Btw.: The PB hairspring is also inside the YM II and the new Milgauss.

[Silvio]

Time for an exibition back on Rolexes? It would be nice to see it working. What do you think?

Originally Posted by Spacedweller

Nice one!

The PB hairspring is inside the Daytona Cal. 4130 mvt. also really does seem to improve the precision

0 secs deviation the first day!

Btw.: The PB hairspring is also inside the YM II and the new Milgauss.

[mike]

Great info, I'm sure it will find it's way into more references.

[watchnut]

According to a recognized authority, the blue color also appeals to the opposite sex, thereby inreasing the "cleavage magnetism factor" exponentionally. (Recognized authority identified only by two identical initials).

[Alcan]

Originally Posted by Silvio

Time for an exibition back on Rolexes? It would be nice to see it working. What do you think?

Something like this?

[Silvio]

I've thought about a clear back for Rolex, but for some reason it just doesn't seem right. It would be nice to see the movement, but honestly I wouldn't buy one.

Originally Posted by Alcan

Something like this?

[daunwaun]

great info silvio thanks for sharing

[daunwaun]

Originally Posted by Alcan

Something like this?

Nice caseback looks great