Somebody else will probably describe it more accurately, but to me it was like the U S portion of the business was under license and didn’t have the close connection to the company that the made in Denmark pieces maintained. Still, I like your set very much.
In the early 1920s Frederick Lunning, a Dane who'd promoted Georg Jensen silver, worked to popularize Jensen with the American public, finding success, in 1924 he opened the first Jensen store in New York (Georg Jensen Inc., New York was owned by the Lunning family until 1968), and he was also given exclusive distributorship for Jensen goods in the U.S. Around 1940, the war in Europe, soon to be WWII, effectively stopped Jensen from exporting their goods to the U.S. and Lunning stayed in business through the war years by supplementing his remaining stock of Jensen silver with American silver of various types, including Jensen-inspired designs, as well as various other high-end goods. Schiffer & Drucker's 'Jensen Silver: The American Designs' (2008) states, "An agreement between Frederick Lunning and the Georg Jensen company directors in Copenhagen was worked out in 1951, formally ending the production and sale of American-made silver marked "Georg Jensen Inc, U.S.A." Therefore, items of sterling silver found today that bear the marks of silversmiths with the shop mark of "Georg Jensen Inc, U.S.A." can safely be dated to the period about 1940 to 1951."
Should be mentioned that Alphonse La Paglia was a talented silversmith and designer, with his production and even his later designs for International Silver very collectable in their own right (the same true for fellow Jensen USA maker William G. deMatteo). Your pieces were shown with other serving sets in a 1948 Jensen USA catalog, described as, "Tulip motif set, 98.00".