Long time no see - welcome back.
Whenever I see part frosted wares in a romantic floral I think Mikasa.
This does looks art deco in style but some deco styles were still being produced in the 1950's and even later. I don't know if Mikasa were dealing in glass at this time.
In the 1930's, Mikasa was established as an international trading company based in Secaucus, New Jersey.
Named in honor of Prince Mikasa, the youngest brother of Emperor Hirohito, Mikasa soon became one of the most recognized Japanese brand names in the West.
The company itself never attempted to "manufacture" any of its dinnerware. Rather, the Mikasa branded items were imported from Japan, Ireland, England, France, and Germany.
By the 1950's customer requests were pouring in from all parts of the country, and department stores could not shelve enough stock to meet demand. By the early 1960's, Mikasa had established a reputation as "the pioneer of American casual."
The 1970's brought new retail store locations. Showrooms and warehouses appeared in Canada, Europe, South Africa, Australia and New Zealand. In an effort to stay as competitive as possible during the 1980's, Mikasa added crystal stemware, stainless steel flatware and other household accessories to its product offerings.
We do know that at least some of Mikasa's frosted glassware items were made by Walther of Germany.
I had thought maybe it was an Ice Cream set but not if
"They all measure the same at 6.75" across"
The Serving plates should be larger