Here is a pic of cal.1222 for comparison

courtesy of The Hour Lounge:

As far as the 1126 vs 1126/1 - the latter movement was uprated to 28,800 vph for higher claimed accuracy. It was used, for instance, in the Ref. 47022 Chronometre Royal with COSC certificate.

Hope this helps

💰210 Marketplace Listings for Vacheron Constantin›

The Caliber 1126/1 verses the Caliber 1222 SC

By: AndyT : November 16th, 2013-08:02

I have received a great photo from VC of the movement inside my 2005 VC Overseas which is being serviced (attached) and note the movement though both marked 21C appears to have a different Caliber number to the latest shown on the VC website - 1126/1 vs 1...

Different watches

By: Tim Jackson : November 16th, 2013-15:52

Hi Andy, The VC Cal 1222 is for the dual timezone version of the Overseas, rather than the simple auto. By the way, the 21C refers to the 21karat gold outer weight on the selfwinding rotor. It isn't a caliber reference. This base caliber is the JLC, as th...

Thanks for responding

By: AndyT : November 17th, 2013-02:43

Hi Tim and thanks, that answers my questions. Nice to know there is a decent carat of gold in there. best wishes Andy

Hi Tim

By: yesjb : November 26th, 2013-08:31

It's also the same movement as in the Malte Tonneau Dual Time (Cal. 1222) Best, Joseph

1126 1126/1 1226?

By: kevster : November 17th, 2013-15:03

Good thread for me as I've always pondered the difference between the Cal 1126 of a few years back the 1126/1 and now the current 1226.

Here is a pic of cal.1222 for comparison

By: Tick Talk : November 17th, 2013-20:56

courtesy of The Hour Lounge: As far as the 1126 vs 1126/1 - the latter movement was uprated to 28,800 vph for higher claimed accuracy. It was used, for instance, in the Ref. 47022 Chronometre Royal with COSC certificate. Hope this helps :-) ...

JLC CAL 889

By: golden hands : December 26th, 2013-14:55

THE BASE EBAUCHE IS THAT OF JLC CAL 889 WHICH IS A CLOCKWISE AND ANTI CLOCKWISE AUTO WINDING ROTOR(650-950 TURN A DAY) WHICH THE CAL 1126 PHOTO SHOWS AS IT HAS THE REVERSER ASSEMBLY(PART 52040) THE TWO SMALL WHEELS AT THE TEN O' CLOCK POSITION. THE REGULA...