Found these beautiful tumblers, need help
with ID...the only mark on the bottom is a very simple sans-serif "JR". I'll upload pics as soon as possible, but they're deep emerald with a pressed, all-over grapevine/grape cluster pattern. The shape isn't a usual tumbler shape, it's wide at the bottom, coming in about 1/4 of the way up, and then curving out again before tapering slightly at the top.
Anyone heard of a "JR" as a mark? The only thing I can find is Stourbridge Flint Glass Works in PA, from 1823-1828 or s.l.t., from one site. Before I identify these as 19th. zebras, I'd sure like to eliminate some more recent horses :) (allthough the pattern could be from an earlier time, IMO)
I'll upload, but if anyone has any info on JR in the interim, I'd sure appreciate it!