huge old glass underplate for Duncan & Miller punch bowl star & flower

Compass star and flower pattern pressed glass underplate for a punch bowl, in excellent condition. It's 20 1/4" in diameter, and about 4 3/4" over the center well to fit the punch bowl. We've seen this pattern called Bassettown as an antique, and replacements dot com calls this pattern Duncan and Miller 40 clear, dating to late 1890s, or very early 1900s. But we don't believe this plate is antique, most likely a US Glass made piece from the old Duncan and Miller molds, mid-century vintage.