First came the "true" donut clamp......hard to get the seatpost to stay put...cool looking, not the best design for function. I have a Magnesium clamp on my Direct Link...anyone know how many were made in Magnesium???????
then they came with the "other" donut (stamped Hutch on both sides) but this time the hole is off-set, making it easier to tighten.
last was the Hi-Caliber donut clamp. It is stamped in the front "Hi-Caliber"
Sorry no pictures....
Correct me if im wrong
Jon