Gyromax Balance in VC

Hello, I, as a new comer here and owner of a very simple Ref.6562, have a few doubts and hope someone here could give me some insights into Gyromax Balance and VC.

1) Why did VC (more suitably V & C) employ a Gyromax balance in some of its models such as Chronometre Royal (Cal. K1072/1) and simple models (e.g., Ref.6562 with K1072/1) despite the fact that the Gyromax balance has been virtually equivalent to PP at first thought? Was there anything behind during the development of the Gyromax balance between VC and PP (a shared technology)?

2) On top of the K1072/1, are there any other VC-stamped movements employing the Gyromax balance?

Best regards,


Gyromax Balance in VC

The 1072 was considered as one of the best automatic calibers of
06/07/2007 - 17:56

its time!  It started with a swan neck fine adjustement and later eveolved into the 1072/1, the /1 meaning that the swan neck adjustment was replaced by a gyromax type free sprung balance.

As far as I know Vacheron was not involved in the developpement of the Gyromax balance and most probably Patek licenced its utilisation to Vacheron Constantin. I need to check to find the reason behind this evolution.

Other movements using the Gyromax balance are the following (list is not exhaustive as I need to check my files)

1050 : manual

1001: manual

1002: manual

1120: automatic

1121: automatic

Two other examples with gyromax balance...
06/07/2007 - 18:09
Are some 1001/1002 calibers, also with the /1 numbering, and early examples of the 1120 (Why VC stopped using the free-sprung balance is mysterious to me as I believe the movement was designed to be free-sprung.)
Thank you, WHL.
06/09/2007 - 00:29

Now, I am being so curious about VC's mystery on VC stopping using the free-sprung balance.

Best regards,


Thank you, Alex....
06/09/2007 - 00:25

now we should be sure that VC was not involved in the development of the Gyromax balance but only being a user. I have heard from somewhere that K.1071 & K1072 were initially a joint development among VC, AP and PP through a contract to JLC. However, PP somehow gave up along the course, letting VC and AP be only the users employing these movements.

Best regards,


The only caliber used in common by Vacheron, Audemars and Patek
06/09/2007 - 00:52

was in fact caliber 1120 which replaced caliber 1072. To the best of my knowledge its the only caliber used in common by the "Big Three"

Cal 1120 was manufactured in 1967 by Jaeger LeCoultre as caliber 920 for Vacheron Constantin, Audemars Piguet an Patek Philippe and only used by them, JLC didn't use this movement in any of its timepieces either.

This caliber was made my JLC but the finish and asseùmbly was done directly by the brands.

Vacheron Constantin used it as calibers 1120/1121 and 1122. Audemars Piguet used it as calibers 2120/2121/2122 and Patek Philippe as caliber 28-255. The latter used in in the first Nautilus models and continued for 10 years.

Many watchmakers I have talked to (and who do not work at VC) consider caliber 1120 to be one of the best and iconic automatic calibers.

Thanks again, Alex, for your correction. My misunderstanding on
06/10/2007 - 02:42

the joint development of the K1071 & K1072....! It was actually the 1120 family!