1) Walther U.P. Model 1 Semi-Automatic pistol advertising flyer. 2) Walther advertising pamphlet for PPK, Model 8, and Model 9a Semi-Automatic pistols. 3) Semi-Automatic pistol shooting booklet ("Pistolen Schiessen") published in 1939 by Gustave Genschow & Co. Shooting stance, sighting, cartridge information, and pistol care are some of the themes covered in the booklet. 4) Unique Walther PPK and PP Semi-Automatic pistol advertising brochure (W 172-4-12. 39-HL), dated 1939. Front of brochure has a holster illustration which folds out to reveal a hand firing the pistol, along with three diagrams with text demonstrating how the hammer works once the trigger has been pulled. The brochure folds out once more to reveal PPK and PP illustrations and four black and white photographs with text.