mod vintage ice textured glass drinking glasses, square base tumblers St Regis?

Set of four heavy pressed glass tumblers, marked with the Libbey L on the bottoms. These are the St Regis pattern, ice textured crystal clear glass, square heavy base with round bowl. 1950s or early 60s vintage.

These are rocks glasses, 3 1/2" tall (listed as 7 ounce size, but these are funtionally 6 ounces I'd say, I don't think you'd fill them brim full). All of these glasses are in very good condition, no chips, very little scratching from use.