Definitely no dinner service, FLW activities were lmited to sketching one vase only (in 2 sizes) and it never made it to production because it was too large to press neatly and too expensive to panel cut..
Cochius, who initiated Unica in 1923 after a pleasure trip to Murano, just loved travel, and was permanently underway - at the expense of the glass factory. His trip to the US "to meet FLW" in 1929 led to the request for a glass design. Because he had not automated production like he should, losses accumulated and Cochius was fired in 1933. The factory went under and was taken over in 1938 by the competition. It may not be what you read in literature about Leerdam - there he is made to look like an idealist and a saint. This is only one of the missing chapters from the official Leerdam hagiography...
Your vase sounds as if it could be unsigned Moser, or Dobronin (now Desna) - it is certainly a nice item. Attached something very similar - but much smaller.