Issued by Spain (España) in 1966, this 1-peseta commemorative stamp celebrates the VI Congreso Forestal Mundial (6th World Forestry Congress). The design features a vibrant green conifer tree paired with a stylized Earth, encircled by an orbital trail symbolizing global environmental cooperation. Printed by F.N.M.T. (Fábrica Nacional de Moneda y Timbre), the stamp reflects mid-20th-century Spanish environmental themes and is a notable ecological thematic issue valued by forestry and conservation topical collectors. Clean lines and earthy tones make this a visually striking addition to a thematic collection.