Based on the legendary Valjoux calibre, the new Valgranges calibre meets the growing demand for watches in large diameters and maybe more important they have the power to run lots of complications better than an old "7750" ever could
There are at least three versions of Valgranges movements made by ETA:
ETA A07.111 - hour, minute, second, date
ETA A07.161 - hour, minute, second, date, power reserve indication
ETA A07.211 - hour, minute, small second, date, chronograph (the standard ETA 7750 is smaller, 13 1/4 lines diameter)
A further version will be launched:
ETA A07.171 - hour, minute, second, date, 24 hour indication.
From Valjoux to Valgranges
The reason for offering the new "Valgranges" is the size. It's much bigger than 2824 and 2892 and so it will fit well to big watch cases. The size is 16 1/2 lines / 37,22 mm diameter; the heigth is 7,9 mm.
The name is based on the town 'Granges' (in Swiss German: Grenchen) were the former manufacturer Valjoux had it's residence.
The size of a Valgranges is 16.5 lignes , while the an ETA-2834) is only 13 Linge. A pretty big difference
One French ligne=2.25583 or roughly 2¼ mm.