1933-37 20rp green, with grilled gum, imperforate single, n.h., large margins all around, faint toned spots at outer margins only, fresh and v.f. otherwise, only one sheet of 25 known, with clear 2002 Renggli certificate (Zu.4z.1.09, SFr 10,000) (Cat No. C4a,var) (Image)

Est.$3,000

1933-37 50c black and red, with grilled gum, imperforate single, n.h., large margins all around, faint toned spots at outer margin at top, fresh and v.f. otherwise, only 50 printed, with clear 2005 Eichele certificate (Zu.9z.1.09, SFr 6,500) (Cat No. C9a,var) (Image)

Est.$1,800

1935 10c on 15c, surcharge inverted, right sheet margin single, n.h., v.f., only 50 printed, signed Hunziker, with his 1961 certificate (catalogued as hinged) (Zu. 20.1A.09, SFr 17,000) cat. $6500 (Cat No. C20a) (Image)

Cat. $6500, Est.$4,000