"BERLIN (STETTINER-BHF: ) 7 2 72" - single circle cancel, KBHW 106, clear on rated receipt (insinuation document) to Oranienburg, inside crown / posthorn stamp the "K. PR. POSTAL SERVICE-EXPED. 4. STETTIN. Railway station. BERLIN". A rare posting stamp, KBHW valuation 500 points