1913 Forerunners, eight different, l.h. or h.r., fine-v.f. (Zu.I, III, V-VIII, X,XII) cat. $2920 (Image)

Cat. $2920, Est.$750

1913 Burgdorf-Bern, 50c green canceled 30.III.13 and used in combination with 5c Tell on official picture postcard, v.f., with Kirchberg arrival cds below, rare (Zu.IV) cat. $1200 (Image)

Cat. $1200, Est.$500

1913 Burgdorf-Bern, 50c green canceled 30.III.13 and used in combination with 5c Tell on Oskar Bider picture postcard, addressed to Bern, some irregular perfs and peripheral toning, otherwise fine (Zu.IV) cat. $1200 (Image)

Cat. $1200, Est.$300

1913 Burgdorf-Bern, 50c green canceled 30.III.13 and used in combination with 5c Tell on official picture postcard, v.f., with 1984 Liniger certificate (Zu.IV) cat. $1200 (Image)

Cat. $1200, Est.$500

1913 Sittern-Sion, 50c red, canceled 18.V.13 used in combination with 5c Tell on official picture postcard, minor creases and stains, fine appearance (Zu.Xa) cat. $3200 (Image)

Cat. $3200, Est.$500

1913 Vevey-Villeneuve picture postcard franked with 5c Tell, canceled 22.VI.13, with red "Poste Aerienne Vevey", somewhat unfresh, v.f., rare, with 1997 von der Weid certificate (Image)

Est.$300

1920 30rp with Propeller overprint, canceled "Bahnpost 21-5", perfectly centered, fresh and v.f., with 1984 Marchand/Von der Weid certificate (Zu.1,800 SFr) cat. $1250 (Cat No. C1) (Image)

Cat. $1250, Est.$400

1920 30rp with Propeller overprint, canceled Lugano 4.VI.21 and tied on large piece, v.f., signed Liniger, with his 1977 certificate (Zu.1,800 SFr) cat. $1250 (Cat No. C1) (Image)

Cat. $1250, Est.$400

1935 50c gray green and scarlet, with grilled gum, imperforate sheet margin single, n.h., v.f., with 1984 Zumstein certificate. A rare Swiss Air Post, one of only 50 printed (Zu.9z/A9) cat. $6500 (Cat No. C9a,var) (Image)

Cat. $6500, Est.$3,000

1936 40c on 90c blue gray, vermilion surcharge, canceled by Zollikon 8.XII.39 pmk on piece, tiny toned speck, still v.f., with 1983 Rellstab certificate (Zu.24a,950 SFr) cat. $800 (Cat No. C25a) (Image)

Cat. $800, Est.$250

1936 40c on 90c blue gray, vermilion surcharge, canceled by Basel 26.V.38 cds and used with additional franking on registered and flown cover to France, minor ink staining around the address portion, otherwise fine usage, with Avignon arrival pmk on back (Zu.24a) cat. $1200 (Cat No. C25a) (Image)

Cat. $1200, Est.$500

1938 75c on 50c "Pro Aero", uncanceled, overprinted "Specimen" in red, unused without gum, v.f. (Cat No. C26S) (Image)

Est.$500