cover 18Kr. deep brick-red with 3Kr. rose on 1875 insured envelope to Switzerland, cancelled by single-ring "AMERANG 4/4" d.s. with registration label and arrival c.d.s adjacent; a few minor rust spots in no way detract from the importance of this item. Extremely rare and attractive. Signed Brettl. M.27Xb, 23X. Photo on colour