The Sig Pro is available in two finishes: Nitron (all-black) and Two-Tone (in-the-white stainless steel slide and black frame). Unlike Two-Tone Sig Classics that have nickel-plated slides to match the nickel-plated controls on the frame, the Two-Tone Sig Pros have in-the-white stainless steel slides. The SP 2022 is currently available only in Nitron (all-black) finish.
Here are some photos of my Two-Tone Sig Pro SP 2340 chambered in .357 Sig, with SIGLITE night sights:
Here are some photos of my Nitron Sig Pro SP 2009 chambered in 9mm, with SIGLITE night sights:
And, here are some photos of my Nitron Sig-Sauer SP 2022 chambered in .357 Sig, with SIGLITE night sights:
