Ok guys , iam new to sig and dont know much. I got a hold of a w german p228. It was made in 1991 code KB. The pistol has a nickel coated frame and a black slide. Guy said it was factory that way. All serial numbers match. I have the orig box . Box says UD228-9-T and under that its says P228-9 T 2MAGS-10RD. Box has the correct serial number. Where these made with nickel frames and black slides?