Peter Barth Milwaukee Red Amber Flask

Just a beautiful Pint sized red amber strap sided flask from Peter Barth Milwaukee.  No glass makers mark.  Found in a farm field rock pile in the early 1970’s, traveled the country and finally came home to Wisconsin as part of club member Steven Libbey’s collection.  Full of bubbles with a number of stable (no cracks) pot stones.  This is the very rare Key Stone slug plate variety.