These were available in the 1960's Shelby catalog, and the Pilsner mugs were available for only a short time. The smaller/larger typical mug is much more common. The Pilsner Mugs were available as either small or large, and both of these are the larger sizes. (they measure 6 inches high). The don't come up for sale very often, so if you collect these items you already know that. I included a typical(5") mug for comparison, which is also available, if you are interested.
The price is $1200 each or the pair for $2100.