Check this out- item#1072878498
These are getting up there-and the reserve isn't yet met! I've always been fascinated by these. I assume the idea was to maintain a high mechanical advantage regardless of the reach. The pivot to pad distance seems very short. How well did they work? Needless to say, no relation to seller (Hilary, I believe).
Best Regards,
Wes Gadd
Unionville,CT