Cc Bg 1920 1280

ETA Valgranges Caliber A07.171

Automatic
·5 Comments·
BrandETA
Caliber NumberA07.171 Valgranges
Movement TypeAutomatic
Linges 16.5”’
Diameter
36.6mm
Height
7.9mm thick
Jewels24
Power Reserve46 hours
Vibrations Per Hour28,800, 4Hz
Shock SystemIncabloc
Regulator
ETACHRON
Rotor Style
Ball-bearing
Rotor Winding
Uni-directional
Hacking Seconds?
Yes
Hand-Windable?
Yes
FeaturesCentral hours, central minutes, central sweeping seconds, central GMT hand (second time zone), quickset date at 3:00
Country of ManufactureSwitzerland
Known ModelsInvicta 12878

The ETA caliber A07.171 is a Swiss made automatic watch movement with 24 jewels. This movement is capable of displaying a second time zone thanks to the centrally located GMT hand. This caliber is based on the ETA 7750 framework and began production in 2006.

Other variations of the A07 family of movements include:

  • A07.111 calibre: hours, minutes, seconds, date
  • A07.161 calibre: hours minutes, seconds, date, power reserve
  • A07.211 calibre: hours, minutes, seconds, date, chronograph
  • A07.171 calibre: hours, minutes, seconds, date, 24-hour hand

Additional Resources:

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William Kee
William Kee
7 years ago

Power Reserve: 46 hr

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Dan T
Dan T
6 years ago

my new longines avigator with the L704.2 movement has a loud rotor noise and it wobbles like a 7750, I read in a blog that it actually comes from a family close to the 7750, so much for the wobble, but it is noisy, anyone out there ever come across this with longines watches, or that particular movement, thanks

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Whatever1
Whatever1
2 months ago
Reply to  Dan T

I have an admiral GMT which had the same loud noise. Got it serviced – after that its been as silent as a cat walk. Perhaps oil dried on yours.

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Longines Caliber L704.2 Watch Movement | Caliber Corner
2 years ago

[…] Longines caliber L704.2 is based on the ETA caliber A07.171 Valgranges. It is a Swiss made automatic watch movement with 24 jewels and a GMT […]

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Glycine Caliber GL293 Watch Movement | Caliber Corner
2 years ago

[…] is found in the Airman 17. Early Glycine Airman 17 watches with the GL 293 caliber were based on ETA caliber A07.171 Valgranges movements, but the model later changed to the GL 293 being based on either an ETA 2893-2 or Sellita SW330-1. […]

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