Mine is the gold anodized version, I bought it from an advert in the back of a bike magazine sometime in the 80's and have been using it since then. This is my second B72 that I've used it on, I wore out the first one after 30 years. It works.

I did grind down the weird shaped rectangular "nut" that the Laprade's bolt threads into (on top of the clamp, right under the saddle). My B72 sags under my load, the leather touches the "nut" on bumps and such. I never noticed it whist riding, just saw the leather dents and addressed the situation the prevent any issues.