1937 German Industrial Invoice - J.J. Marx Filztuchfabrik to Greece - High-Quality Steel Die Engraving Type: Original Commercial Invoice (Rechnung) Date: August 24, 1937 Issuer: Filztuchfabrik J.J. Marx, Lambrecht, Pfalz (Germany). A historic felt and textile manufacturer founded in 1851. A stunning example of pre-war industrial graphic design. The company header features an exquisite Deep Blue Steel Die Engraving (Chalcography). The ink is heavily embossed (raised) and exhibits a characteristic iridescent/metallic luster, a premium printing technique of the era used to convey corporate prestige. The invoice details the sale of "Nassfilz" (wet felt) for paper-making machinery (Machine III), shipped to Greece. It represents the strong industrial ties between Germany and Greece during the interwar period. Issued in Reichsmarks. Features original purple archival stamps, handwritten accounting notations, and an authentic ink signature. Excellent condition for its age. Natural light toning of the paper, original filing holes on the left margin, and standard folding creases. The embossed logo remains sharp and vibrant. Strong custom made packing, registered shipping.