Mass postage paid with 28 stamps on giant cover in the format 35 x 26.5 cm stamped with Michel number. 13 ares (12), 14 d (6), 15 (4), 16 ares (4) and 18 g (2) with round cancel "HELIGOLAND JY 11 1890" to Mainz. Envelope/stamps with slightly Knittersuren. Formerly post-paid stamps, two, further are missing. The catalog value according to Michel of the 28 stamps is in bulk cancelled already 960.-euros. It is very rare for the kind of large-sized shipments! Certificate Müller "interesting show piece from the Rösner correspondence."