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It's either a pseudo-80 series that uses the grip safety to push up the firing pin block which does not affect trigger quality or the newer models are 70 series.

This pistol is definitely a "Series 80" Gregory. It has a Beavertail Grip Safety; Ambidextrous Manual Thumb Safeties; Series 80 Firing Pin Safety

It's either a pseudo-80 series that uses the grip safety to push up the firing pin block which does not affect trigger quality or the newer models are 70 series.