Juodkrantė, Kuršių marios / Memel-Insterburg Railway post 1910's

A postcard of the ship "Cranz" at Schwarzort, now Juodkrantė, Lithuania. Juodkrantė was and is now, a small seaside resort at the Kurisches Haff / Kuršių marios, as it says on the postcard. "Cranz" was a tourist ship linking between the town of Cranz (now Zelenogradsk in Russia,Kaliningrad oblast), a seaside town on the southern end of Kurische Nehrung / Kuršių nerija, and Memel / Klaipėda, on the northern end. The name "Cranz" comes from the lithuanian word "Krantas" which means "shore".
The cancellation is the german railway post / bahnpost of the line "Insterburg (now Chernyakhovsk in Russia,Kaliningrad oblast) - Memel", but unfortunately the year of use is not visible but from the stamp, i assume its from the 1910's, before the formation of the self-government of Memelgebiet in 1920 after WWI. Juodkrantė doesn't have a railway station,so it's possibly posted from Klaipėda.