I am debating on selling my irons. I know they are authentic (a relative bought them new). They have true temper dynamic gold s300 shafts, diamonds on the face, 2 grooves at the top, and the numbers 14851 on all of them. I have 3-pw, they have newer grips, and are in great condition for their age. I have used them about two dozen times(or less) a year for 10 years. Any thoughts on these clubs? What year are they?