It was listed by Bushells Antiques. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Bushells Antiques has dated this Raymond Loewy Form 2000 Coffee Set to the 1950s.

This beautiful set includes a coffee pot, sugar bowl, creamer, and twelve cups and saucers cups. It highlights its form with a gray body and white interior, and has a timeless look that will never go out of style. Marked on the bottom: Rosenthal, Germany, and on the creamer and coffee pot, Secunda Grau.

About the designer from Wikipedia:Raymond Loewy (November 5, 1893 – July 14, 1986) was a French-born American industrial designer who achieved fame for the magnitude of his design efforts across a variety of industries.

He was recognized for this by Time magazine and featured on its cover on October 31, 1949. This Stylish 27 piece Raymond Loewy for Rosenthal coffee service has Twelve cups 4.25" diameter 2.5" tall , Twelve saucers 6.5" diameter , creamer 3" diameter 4.5" tall , sugar bowl 4" diameter 3" tall , coffee pot 10" tall .
Condition: Very good vintage condition hardly used with no damage or repairs and ready to display.
Bushells Antiques has dated this Raymond Loewy Form 2000 Coffee Set to the 1950s.
Fine art, porcelain, jewellery, silver, clocks, pictures, oriental objects d’art and furniture
You can view the stock and full dealer information on the Bushells Antiques Profile Page