You're the first!
No, I don't know the reference, but I believe it's from the first generation of Girard-Perregaux alarm watches.
You'll find a few right now on the bay in not quite as good a condition, but close. And
@DTMwatch has a later generation one (reference 8999) in great condition for sale on another forum. Send him a PM here.
I almost bought his, but then opted for this older one with the blue alarm numerals...
Click to expand...