ETA Valgranges Caliber A07.171

Brand	ETA
Caliber Number	A07.171 Valgranges
Movement Type	Automatic
Linges	16.5”’
Diameter	36.6mm
Height	7.9mm thick
Jewels	24
Power Reserve	46 hours
Vibrations Per Hour	28,800, 4Hz
Shock System	Incabloc
Regulator	ETACHRON
Rotor Style	Ball-bearing
Rotor Winding	Uni-directional
Hacking Seconds?	Yes
Hand-Windable?	Yes
Features	Central hours, central minutes, central sweeping seconds, central GMT hand (second time zone), quickset date at 3:00
Country of Manufacture	Switzerland
Known Models	Invicta 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:

• More info on the ETA site
• All about Valgranges movements