5 Pesa on 10 Pfennig definitive stamp, Crown/Eagle design, bright reddish-purple, red-quilled, German East Africa with black, three-line printed overprint, cancelled with a circular postmark "DEUTSCHE SEEPOST / OST- / AFRIKANISCHE / ZWEIGLINIE * * 27 / 11 99 (Type c), clear strike on a small piece of mail, certified by Bothe BPP and a red mark, photo certificate Michael Jaeschke-Lantelme (2025) "in excellent used condition", relatively rare cancellation.