Swiss SG8 1850 Rayon I 5r red black and deep blue cross without frame type 5

1850 Rayon I 5r. red black and deep blue central cross without frame type 5 lightly used with P.P. cancel in black 4 very large margins with top sheet margin R. Berra-Gautschy certificate SG 8 cat 1300 pounds. Ex Dunlop