Pair of Blenko Glass hand blown 448R single ring old fashion tumblers, crystal with amber ring

Pair of Blenko Glass hand blown 448R single old fashion ring tumblers, crystal. Not sure what color the rings are. Possibly they were supposed to be tangerine but the color didn’t come out right. Both are the same color, just don’t know for sure what color.
These were added to the line in the 1940s but production continued for many years
This listing is for one pair of tumblers.
Very clean, no chips or cracks.
About 3-1/2” tall, 3” across the top.
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