DSP line Hamburg West Africa 7.6.10 \"XXXIX\", steamer \"Frieda Woermann\", multiple mounted on vertical pair 10 Pfg imperial yacht on large part one commercial cover front \"Woermann, Brock & Co., Swakopmund\" to the ancestral home, with handwritten entries of the steamer as well \"private\" and violet two-line cancel \"German protectorate\", superb