Rolex Parachrom Bleu Hairspring Picture

Rolex Parachrom Bleu Hairspring

Rolex Parachrom Bleu Hairspring Picture

Rolex’s Parachrom Bleu Hairspring is an in-house hairspring comprised of a paramagnetic alloy – made from metal, not silicon.

The technology behind this hairspring was first introduced by Rolex in 2000.

What was the first Rolex watch with the Parachrom Bleu Hairspring?

Many sites incorrectly state that the 116520 Daytona caliber 4130 was the first movement to feature the Parachom Bleu Hairspring. Technically a “Parachom” hairspring was indeed first used in Daytona watches starting in 2000, but it wasn’t blued. Improvements and the blue color came in 2005.

Which calibers have it?

The Parachrom Bleu Hairspring was used in the 18K gold with green dial GMT-Master II (116718) and Rolesor (extra way of saying two-tone) GMT-Master II (116713) ceramic bezel watches since 2005.

Marketing-wise, however, the first notable push of new blue hairspring was at Baselworld 2007, when they released the all stainless steel GMT-Master II Ceramic (116710) with the caliber 3186.

Today, every Rolex caliber is equipped with a Parachrom Bleu Hairspring.

Bleu or Blue?

“Bleu” is not a typo, it’s French for the word blue. For years, Rolex referred to this hairspring as being Parachrom Bleu, but as of this post they write it as Blue Parachrom. Some folks even write it as Blu.

Rolex loves to make up and use fancy verbiage for their products, and the story is no different in this case. Parachrom is said to be a combination of the words: paramagnetic and chrom.

When something is paramagnetic, it does not retain magnetism and is weakly affected by magnetic fields. “Chrom” comes from the Greek word for color which is chrôma. Bleu, as noted is French for blue.

In Rolex’s Own Words:

“After five years of research, Rolex created the blue Parachrom hairspring. Crafted from a paramagnetic alloy, it is unaffected by magnetic fields and up to 10 times more resistant to shocks. Historically, the unique blue colour of the hairspring has been a sign of prestige reserved for only the most accurate timepieces.”

Until the introduction of this hairspring, Rolex was using Nivarox (short for Non-Variable-Non-Oxidizing) hairsprings. Nivarox is owned by the Swatch Group, Rolex’s most fierce competitor.

Additional Resources:

You are reading Caliber Corner, the world's most popular resource for watch movement pics, specs, mods and DIY repairs. Follow @calibercorner on Twitter, Instagram but NOT Facebook. Subscribe on YouTube. Join our mission to spread movement awareness!

Join the discussion on Rolex Parachrom Bleu Hairspring?

  • Keep comments respectful and follow our community guidelines.
  • Keep comments on the topic of Rolex Parachrom Bleu Hairspring

For off topic or general watch questions, post in the Caliber Corner Forum.


newest most voted
Inline Feedbacks
View all comments
2 years ago

in the item ” wich caliber have it ” you just mention Rolex watches models , instead of … calibers !! I CAN SAY THAT THE 3186 CALIBER WAS THE FIRST ONE TO HAVE THE “BLEU” ONE .

Rolex Caliber 3135 Watch Movement | Caliber Corner
1 year ago

[…] paramagnetic Parachrom Blue hairpspring started showing up in 3135 movements around 2007/2008 (Deepsea Sea-Dweller and ceramic bezel […]

Seagull Caliber St19

Join our mission to spread movement awareness!

Members Online

  • pc1093 Vansay

Recent Forum Posts

Trending Comments


Sellita Caliber SW200 VS SW200-1

Wow man, you should join the R0l3X club, they're desperately looking for new members, but…


Sellita Caliber SW200 VS SW200-1

Basically you are saying that one of the world's most used workhorse movements is complete…


Slava Caliber 2427

Lum-Tec gave up trying to fix my C2 with this movement, now I'm trying to…


Seiko Instruments (SII, TMI) Caliber NH34

Hi mrdibujante, from the specs chart above: "Rotor Direction: Bi-directional (Magic Lever)" indicates that it…

Jeremiah B Leonard

ETA Caliber 955.414

I have one in Gucci watch, says Swiss. See photo….


Would love your thoughts, please comment.x