Patek Philippe

Seeking help identifying this Patek ebauche:

While doing a little research, I have come the curiosity about the ebauche used in certain Patek Philippe watches,
specifically the chronograph/calendar complications of around 1937-1956 (and perhaps some even much later).
The ebauche in question seems to have preceeded the present Lemania, and I have seen it described as 13 lignes, Valjoux.

The picture above is of a complicated PP from 1943, and the others are all identified as ebauche Valjoux 90, almost
exclusively used in calendar watches by a wide variety of firms during the same period, which look like this:

Also, it appears that this same base was used by both PP and Audemars Piguet for Observatory watches:

So, do you think that the ebauche for all those fabulous Pateks is in fact the Valjoux 90? Thanks in advance foe any
assistance and additional comments!

💰1729 Marketplace Listings for Patek Philippe›

Valjoux 88 (moonphase-calendar-chronograph); PP and AP are different movements (nt)

By: sss : January 24th, 2007-19:53

all indications are that V72, V88 and V90 are done on

By: SteveG : January 25th, 2007-05:56

...

It's a bit comlicated, but here you go...

By: SuitbertW : January 25th, 2007-05:52

Hi Steve, it's a bit complicated, but quite simple at the same time Please take all below with a grain of salt - it's what I believe is correct, but I don't consider this authoritatively. All movements you mention share the same roots and in this case "ro...

Thanks So Much! It helps a great deal, and my specific interest is in finding the

By: SteveG : January 25th, 2007-06:05

connections to the movement in this AP from 1948. I posted this long ago (before your tenure most likely!) and got not too much information back, but then also my own resources were much thinner. The movement: and my beautiful dress watch:...

hI Suitbert . I'm not sure if you got my two previous responds on your post. I have some difficulties to post pictures of my watch on this site even they have been re-sized. Anyways, thanks for your respond on my inquire. But I still have a problem with m...

Hi Yuri,...

By: SuitbertW : March 14th, 2013-14:32

it would be helpfull to see some pictures, or at least a better description of the problem. Which part of the escape wheel doesn't fit (pivots, escape wheel diameter, pinion...). I'm not sure later Valjoux (cal. 23 onwards) do fit older Valjoux VZ specs -...

Audemars Piguet VZSS and images

By: yaadar : March 15th, 2013-11:25

Hi Suitbert. Really appreciate your respond. Seems to me nobody else is get more information about these movements, then you. Now seems to me I be able to upload two images of my AP movement. As you can see a cap jewel on the back side of the movement for...

Audemars Piguet VZSS

By: yaadar : March 20th, 2013-09:05

Hi SuitbertW. I'm wondering if you be able to find more information about this AP mvt or where I can get correct escape wheel. I just do not know what to do about it. I contacted the company, they do not know much about it. Thanks, Yuri P.S. in previous t...