I went to the GZ watch market to look for the Officine Panerai rubber strap with "deployant". It's really a double butterfly clasp and the clasp does in fact have some markings on it like "Swiss Made" and "Officine Panerai". However, one big thing I noted is that the stainless steel is a different quality from the ones that are used on the OEM clasp, moreover, the butterfly deployant is not 100% the same as the real deal.
I get nickel allergy reactions with mine and unfortunately, cannot swap the cheap deployant for a buckle because it wouldn't fit.
PS: Yes, the rubber is really soft. The most disappointing aspect is probably the rubber loop fastener. You're better off with the OEM if you can afford it.