Parachrom hairspring

[Dirt]

Originally Posted by padi56

Well in the real world with todays mainly pampered watches it would make little or no difference whatever the mainspring was called in the case. Even some movements like the Chinese seagull ST19 after a bit of careful regulation can run to average -+ 2 seconds a day, movement cost around $75 now. Bought a few Alpha watches with this movement as a donna for another chronograph that was beyond repair, almost 10 years ago still ticking strong and keeping excellent time, but have re-regulated a few times over those years.

Our discussion has had me thinking and I googled with the hope of coming across the history around the introduction of the Parachrome blue hairspring in the 3135.

Sources varied around the Sub with some references indicating 2010.
Then I came across a very detailed review in December 2010 of the DSSD which outlined the introduction of the Parachrome blue in the 3135 with the 2008 DSSD along with special mention of the imminent introduction of it in the 3135 with the release of the 6 digit Sub.