As above said we can decide nothing definitively because definition of pics are not good enough
Maybe is a
reshaped old H maker swan neck spring (because new Hmaker are fitted with SN spring Noob type)
The main key is the distance between the curved shape on the tip of the support and the first fixation screw, marked in red in below comparison pic. Rep distance is smaller due to the reshaped.
Another weird thing is the distance between OFFICINE PANERAI inscription and the near jewel, in the unknown watch is bigger than in gen, just like some reps.
Just my opinion seeing available pics
ALE