Mesa Verde

Beautiful FDC showcasing 'Pueblo Pottery' from the 4v set of 1977 with Cliff Palace, Mesa Verde on the cachet. Unsure why this stamp set is often classified under 'American Folk Art'. 
Check out this cover addressed to the one and only Clyde Sarzin! How cool is that?  
This 1980 cover has the above pueblo pot stamp image on attached cardboard. Did the USPS give these away as promo cards? Or did Sarzin reproduce the image? 
Mesa Verde cancellation of Cliff Palace for the 1984 World Conference on Cultural Parks.
Thank you Melody for this postcard.
Metates in Cliff Palace, photo taken on a summer 2014 trip!