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postage
1991, Sep 15 500th Anniversary of the Discovery of America, 1992 - Birds issue unwmk (no perf info)
| - | $360 | multi | Merganetta armata | — | — |
1991, Sep 30 700th Anniversary of the Swiss Federation - Orchids issue
| - | $360 | multi | Cycnoches ventricosum | — | — | |
| - | $360 | multi | Paphiopedilum sp. | — | — | |
| - | $360 | multi | Miltonia sp. | — | — |
1991, Oct 30 700th Anniversary of Swiss Confederation issue
| - | $360 | multi | — | — | ||
| - | $360 | multi | — | — |
1991, Nov 16 Phila Nippon '91 issue
| - | $360 | multi | Shin-Kansen | — | — | |
| - | $360 | multi | — | — |
1991, Dec 16 Fungi 1991 issue
| - | $360 | multi | Russula integra | — | — | |
| - | $360 | multi | Coprinus micaceus | — | — |
1991, Dec 17 Christmas 1991 issue
| - | $360 | multi | Painting by Rubens | — | — | |
| - | $360 | multi | Painting by Durer | — | — |
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