I did some more looking around on this topic. Here's what we know.
The Nevada II toe and Grand Prix/ N17 heel came out around 1963.
It had the metal protector to mount to the ski under the heel 'riser' and the early style turntable base. Twin rollers for the astragal on leather boots and screw setting adjuster with range from thread just appearing to screwed down tight.
In this 1966 ad, it appears there is no plastic cover plate but not conclusive.
This 1970 ad shows the new style protector/hold down guide in place of the metal strip and the same early turntable base but now with plastic protector (which would fit earlier models already out)
And by 1971 the new style turntable base was out with the tabs to secure the plastic protector more securely.(and Teflon coated wings on the toe)
So draw your own conclusions from what we can nail down. LOOK was slowly evolving the turntable to make incremental improvements over the years. My guess is the covers showed up in the late 60's. It must be making skiers happy because the basic design is still going strong almost 55 years later . Now if we can only get them to bring back the Pivot15!!!
The Nevada II toe and Grand Prix/ N17 heel came out around 1963.
It had the metal protector to mount to the ski under the heel 'riser' and the early style turntable base. Twin rollers for the astragal on leather boots and screw setting adjuster with range from thread just appearing to screwed down tight.
In this 1966 ad, it appears there is no plastic cover plate but not conclusive.
This 1970 ad shows the new style protector/hold down guide in place of the metal strip and the same early turntable base but now with plastic protector (which would fit earlier models already out)
And by 1971 the new style turntable base was out with the tabs to secure the plastic protector more securely.(and Teflon coated wings on the toe)
So draw your own conclusions from what we can nail down. LOOK was slowly evolving the turntable to make incremental improvements over the years. My guess is the covers showed up in the late 60's. It must be making skiers happy because the basic design is still going strong almost 55 years later . Now if we can only get them to bring back the Pivot15!!!