Hi Aenobarbo, thanks for your answer.
The previous owner might have the name of the recipient, it will be sent to you when available.
Further I have some questions which I do hope you can find the time to answer:
Do you know who did produce the early 1937 Adlers with ring, perhaps none of the larger producers? I would also like to know if this set has a higher market value, than for example the later produced adler set with breast star at Weitze ?(6500 Euros) Are these early sets rare, or are there still quite a lot of them among Adler collectors in Spain?