A QSL from DFS (Deutsche Flugsicherung) for NDB WSN Weser on 378 kHz. This one was sent with the other QSLs for NDB FS Dresden, NDB NOR Nordholz and NDB MYN Münster.

QSL card for NDB WSN, Weser, on 378 kHZ

The function of this beacon is not immediately clear to me. I got no further than: primarily supports air navigation in the Bremen/Hamburg/Bremerhaven region of northern Germany. It is not aligned with any of the runways.

NDB WSN Weser located between Bremen and Hamburg (Skyvector)

The beacon can be observed from some distance at Google Streetview, south of Holste.

Location NDB WSN Weser (Googlemaps, Streetview)