I can't seem to tie in the part nos with what is shown on realoem:
High GS = 5253 768 1139
Std GS = 5253 768 0637
My 2007 bike has the std seat and has the part no that you have quoted!
All very confusing - I think I'll go for the £££
Touratech high sports seat!
Why not just get an original seat (any size) rebuilt and covered to your exact specification - you will save a small fortune