The Butterfly postage stamps were issued in 1977 as part of a set of related and similarly themed stamps that were issued and sold together. The
Butterfly U.S. Postage Stamps, Face Value 13 Cents, 1977
1712-15 - 1977 13c Butterflies - Mystic Stamp Company
First Day of Issue Butterflies United States 13 Cent Denomination Stamps for sale
1712-15 - 1977 13c Butterflies - Mystic Stamp Company
Butterfly Postage
Lot of 4 USPS Postage Stamp 13 Cent FRAMED Butterfly Swallowtail Dogface (1977)
Butterfly Stamp Sheet, 50 Stamps, 13 Cent US Postage Stamps, 1977, Dogface, Swallowtail, Orange-tip, Checkerspot
4462/5346 - 2010-19 Butterflies set of 7 - Mystic Stamp Company
Postage Stamps Butterfly Collection 30 Butterflies Stamp Collection of Butterflies From Poland Rwanda Romania Africa Butterfly Collection
Mint Never Hinged/MNH Butterflies United States 13 Cent Denomination Stamps for sale