I have a Schon with the same pin and one of the shafts that has SCHON 13 on the colloar. I order 4 new shafts from Schon and they all fit pefecty. The new ones have the Shon logo engraved lengthwise in the wood above the collar, just like all new Schons.
why not call Schon and order one? Last shaft I brought from them I got in about a week, brand new. Cost from them was about the same as any of the resellers, and they are easy to deal with if you call.