WINDSOR DEWDROP (AKA) by Windsor Glass Company (Pittsburgh-PA, Company Operated: 1886-1890), c1888 Introduced
NOTE: Sid Lethbridge 2019 - This pattern is assigned to the Windsor Glass Co. based on the appearance of the mug in 1888 C.M. Linington and 1889 Butler Bros catalogs with Crescent aka Jersey Swirl, a documented Windsor pattern. There are two sizes/shapes of Windsor Dewdrop mug. One with 10 rows and one with 8 rows. Neither ad gives dimensions.
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Shape:
Contributor:

Shape: Cups & Mugs
Contributor: Sandy Cohen (1,2), Brad Gougeon, Gene Serbus

Shape: Research Update
Contributor: Sid Lethbridge

Shape: Research Update
Contributor: Sid Lethbridge