French Marianne de Decaris 0.25 Franc Pair on Piece with Paris to Montevideo Postmark

This item is a cut-out piece of paper, likely from an envelope or postcard, bearing two French postage stamps. The stamps are of the 'Marianne de Decaris' series, characterized by the profile of a woman (Marianne, the allegorical figure of the French Republic) facing left, in a reddish-pink hue on a white or very light background. Each stamp has a denomination of '0.25' (likely 0.25 French Francs) printed below the Marianne portrait. Both stamps are postmarked with a black, wavy line cancellation, indicating they have been used. Overlapping the right stamp and the piece of paper it's attached to is a circular date stamp, partially legible, but clearly showing 'PARIS 78', '16H15', '12-11 1964', and 'R.DE MONTEVIDEO (S.DE)' in a curved inscription along the bottom, suggesting international mail from Paris to Montevideo, likely in Uruguay. The paper itself is off-white or cream-colored, with slightly uneven, torn edges, indicating it was manually removed from its original context. Some text is visible above the stamps, including 'DE DROIT' and 'ONOMIQUES DE PARIS', which likely refers to an institution or organization in Paris, such as 'SCIENCES ECONOMIQUES DE PARIS'. The stamps exhibit minor wear consistent with postal use and age, including slight fading of color and the impression of the cancellation. The overall condition is fair, reflecting its age of nearly 60 years. The craftsmanship of the stamps is typical of national postal issues, with clear engraving and design.