Sig Pro frames have the "SIG" logo and the text "Frame made in Switzerland" molded into the left side, and the warning (see FAQ IV-3) on the right side. Here is a photo of the left-side markings:
The SP 2022 has its frame made in Germany, not in Switzerland, and its frame indicates this:
In addition, the left and right sides of the grip inserts have the text "sig pro" molded close to the backstrap. Here is a photo of the left side of the thinner/smaller/stippled grip insert, showing the "sig pro" text, along with a photo of an uninstalled thicker/larger/padded grip insert (the grey padding indicates that it is from a Two-Tone Sig Pro) showing the same.
