3 F/5 Pf, shade b in horizontal pair and block of four, and 1 1/2 P/10 PF, shade e, on cover to Blankenese, cancelled with circular-arc HELIGOLAND JY 30 1890 handstamp, arrival BLANKENESE 1. 31/7/90 1-7 V on reverse, expertised Diena, sound condition