Duncan Miller & Sons Crystal EAPG Waffle Block Punch Cup. This is Duncan’s Late Block sometimes called Waffle Block #331 pattern made for U.S. Glass Co. circa 1891 crystal punch cup. This lovely Early American Pattern Glass piece measures 2-1/2 inches tall and is in mint condition. This wonderful small cup would compliment Imperial Glass Co.’s “Monticello, Waffle #696” circa 1920-1960. It is a typical block pattern consisting of vertical rows of blocks. It could also flatter Heisey Glass’s “Victorian” pattern.