Only 2 were made, in 2000.
It uses a GP movement, and the case is in Platinum, 42mm
The buckle is in WG.
As for the comparison with the GP Tourbillon under 3 golden bridges, I by far preefer the GP.
Why?
Simple!
This GP is a cult watch, vsomething you don't have to touch, to modify, to banalize.
A Panerai is not a complicated watch, and if it is, this is a non sense watch, even if nice.
My 2 cents.
Nicolas