StephBretonne wrote:
I have been using the smpl on a daily basis for almost 5 years. I find the copy in the photo of 13_A_13 very strange. It looks like it has a diameter of 24 mm and has grooves while the original is smooth. Is this a labelling error?

No, no mistake. 22mm diameter. Grooves I did myself just for fun, because I have more whem one SMPLs. It was clone)))