Folded sheet printed on two sides on laid paper watermarked ‘A. Cowan & Sons / 1852 / Patent’. The year 1852 coincided with the passing of the British Patent Law Amendment Act of 1852. During this era, A. Cowan & Sons patented several innovations in paper processing, envelope manufacturing, and watermarking techniques. Paper watermarked with "Patent" typically denotes sheets produced using specialized machine-molded techniques (like early dandy rolls) or proprietary chemical finishes rather than traditional hand-molding. Good condition, creased. With printed excerpt from the Dumfries-shire Herald of 7 January 1853
Folded sheet printed on two sides on laid paper watermarked ‘A. Cowan & Sons / 1852 / Patent’. The year 1852 coincided with the passing of the British Patent Law Amendment Act of 1852. During this era, A. Cowan & Sons patented several innovations in paper processing, envelope manufacturing, and watermarking techniques. Paper watermarked with "Patent" typically denotes sheets produced using specialized machine-molded techniques (like early dandy rolls) or proprietary chemical finishes rather than traditional hand-molding. Good condition, creased. With printed excerpt from the Dumfries-shire Herald of 7 January 1853
