What do you mean by runway? All Raf main line stuff has the collection (spring/fall, year) on the label.
If you are asking if you have a couture piece the answer is obviously no. If you are asking whether or not the piece you have was shown in the collection it's easy to tell by looking at his SS08 show. Most of the pieces that are shown in the show get produced in some variant.
Your use of "couture" is even more vague than his use of "runway"