Funny you should mention that, Ive been working on such a project for some time, also with the different selvedges too. I'll post up pics of the various Waistpatches soon although defining the exact year that each one appeared is difficult because often the change happens as a crossover over 2 seperate years, ie the waistpatch could be say 2005/2006 design for example but it will at least give you a rough idea of which designs are genuine at least