20 Pfg Germania dark ultramarine, correctly franked multiple franking on registered letter (registration label with ship stamp King marked) from "German sea mail / east / African / Head line / * k 29 / 9 / 05" to Rasselstein respectively forwarded to Wiesbaden, the right stamp of the franking caused by use few short perfs right above, photo expertize Jäschke-Lantelme BPP (2019) : "registered covers from the ship routes are comparatively rare. "