1906 Commercial envelope from Helsinki, endorsed « per S.S. Primula / Schiffspost », with Finnish 7k and Russian 3k cancelled on arrival in Lubeck with boxed « K.B. / AUS / DANEMARK » with cds adjacent, fine and rare cancellation, ex Liphschutz, cert. Holcombe (1992) The S.S. Primula belonged to the Helsingfors Angfartygs Aktiebolaget (Helsinki Steamship Co.) which ran a service from Helsinki to Lubeck via Revel. The K. B. (Kasten Brief) marks were applied at the port of Lubeck to mail taken from the mobile letterboxes on board ships. Use of the « aus Danemark » canceller suggest that the Primula had made a call at a Danish port before Lubeck or the wrong canceller was used.