To complement the serie “Butterflies – III” two items of postal stationery, i.e. envelopes with imprinted stamps, are being issued. These issues are available at two face values: the “Common Blue”, Polyommatus icarus, with a face value of CHF 0.85 and the “Dark-Green Fritillary”, Argynnis aglaja, with a face value of CHF 1.00. For security reasons both face designs are enclosed by an edging of copy-proof silver. These consumer-friendly items of postal stationery are available in envelope sizes C6 and C5.