High grade PW movement - Identification required

[Roy Horrorlogic]

Does anyone recognise this one? It bears some resemblance to both an Audemars and a Touchon movement which I also have.
Roy

 

[Ethan Lipsig]

I suspect that Lecoultre made the underlying ebauche. I have a P. Ditisheim observatory-grade watch based on this ebauche.



I also have seen two Touchons based on this ebauche. One of them is also signed by Agassiz (it is signed by Touchon under the dial). In my Touchon serial number database (Dropbox - Touchon Serial Numbers.doc), I classify them as Type TO8A movements.