ROCK OF AGES NIGHT LAMP (OMN) by Dalzell, Gilmore and Leighton Glass Co.(Findlay-OH, Company Operated 1888-1899) , 1893 Introduced
NOTE: Eileen White 20921: re never-seen cross shade: I always had the idea that the shade would crack with the heat of the flame and that may be why nobody has one and maybe they discontinued manufacture because of that.
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Shape: Lamp & Lamp Shades
Contributor: Robert Culver shade is missing

Shape: Catalogue/Ads
Contributor: Robert Culver Pottery and Glass Review June 2, 1892