This is quite interesting to me.
Those were the days when GP was a flexible and would offer special dials and such when asked.
It make sense now when you said 2007.
I put some pics of your prototype dial next to the final production one.
I see two differences:
1. 11,12,1 and the rest the applied indices.
2. No “automatic”.
I would have asked GP to engrave“prototype” on the caseback. 😃
Congratulations, It’s cool




to have a piece unique like this.
This is an excellent review:
https://www.watchprozine.com/girard-perregaux/review-girard-perregaux-1999-chronograph-ref-4946/5295573/6/