I picked up a service of this ultra-marine / teal tableware here on US east coast. Based on the tumbler form and color I initially thought perhaps Scandinavian (Riihimaki, Nuutajarvi ?). But the base ground base ring looks similar to American Imperial glass from the 1950's as well. Any thoughts on who did this series.
water goblet 6 1/8", champagne saucer / sherbet 5", tall tumbler 5", short tumbler 2 7/8"