Congrats and welcome to the forum. You got yourself one of the scarce "blackened" variations.
The 945 PC came out in 1998, and a number of variations were produced from distributors such as RSR and Camfour having special runs made to their specifications.
While the 945 has been produced with different barrel lengths, sights, frame material/finish, etc... the internals are pretty much the same.
Mine is one of the variations without the large "945" designation on the slide: