As Panerai inpsired themself from a Vintage model, the 6152, it may be a bit less domed than in the 127 or 217...
A bit like this:
But yes, as the case of the 127 / 217 is very close to the original Vintage watch, I can't imagine that we'd have a flat crystal on this kind of watch...
It would be an heresy, IMO...
So, let's keep the Statu Quo, or maybe a bit less domed, but the domed crystal is DNA!
Best.
Nicolas