Ball SpringLOCK is a patented shock protection device that acts as a cage around the hairspring, protecting it from jolts and impacts.
Improved Accuracy:
According to Ball, vibrations and shocks can account for a loss of up to 60 seconds per day for a mechanical watch movement. SpringLOCK is claimed to reduce this deviation in accuracy by up to 66%.
In Ball Watch Company’s own words:
“Disorient of balance-spring upon shock impact is the most common cause of watch inaccuracy. SpringLOCK®, the world’s first revolutionary and BALL’s patented anti-shock system, enhances watch accuracy by reducing balance-spring’s shock impact by 66%.”
Ball Calibers with SpringLOCK:
We have found movements featuring this technology with the letters -CSL after the caliber number. The C is for chronometer, SL is for SpringLOCK. Not sure if they have simply -SL movements without the C (comment below if you know more about this), but since this device is supposed to improve accuracy, it makes sense that it is used in the chronometer grade movements.
Images:
Additional Resources:
Trending Comments
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…
Citizen Caliber 8210
Es más preciso de lo que anuncia. Unos 12 segundos se adelanta al día, para…
Ingersoll Caliber 520
Mine is weird. It doesn't like to be fully wound. It looses seconds if I…
Seiko Caliber 7009
Thank you, Arash. Listing updated.
Active Caliber Listings
Tengo un mondaine big date que al cambiarle la batería dejo de funcionar la verdad…
My apologies, I missed that somehow.
Hi Gary L, you are correct. Please see the SW300-1 here and the SW330-1 here.
Hello everyone, I think the SW300 is Sellita’s version of the ETA 2892-A2. The GMT…
As far as I know, this caliber was produced in the mid-eighties to the mid-nineties