ammunition, while the Z-63 uses 9×19 Parabellum. The two models differ internally, but outside they are practically identical. All parts of the Z-62/Z-63 are constructed of metal. Star Model Z-70 and Z-70B: After the entrance of Spain into NATO, the Z-70 was issued from the outset in 9×19mm Parabellum NATO caliber. Star Model Z-75 model: The Z-75 was a developmental model that introduced the use of plastic/composite materials in order to reduce weight. The Z-75's design was a radical change from earlier Star submachine guns, and resembles the Israeli UZI in appearance. The later Z-84 is nothing more than a revised version of the Z-75. Star Model Z-84: In 1985, the Spanish Army introduced the revised Star Z-84 for service with some units in the Spanish Army. The new Z-84 was designed to operate reliably on semi-jacketed hollow-point or soft-point (expanding bullet) ammunition as well as military 9mm NATO full-metal-jacket cartridges, and could be fitted with 25 or 30-round magazines. It was originally envisioned that the Z-84 would replace all submachine guns then in service, but a decrease in reliance on submachine guns as a primary small arm for the Spanish armed forces resulted in a decision to retain the Z-70 for substitute issue on an as-needed basis. The Z-84 itself was largely replaced by the Heckler & Koch MP5, but is still used by units of the Spanish Navy, Guardia, and Police units. In the Spanish armed forces, the Z-84 is colloquially known as "the Zeta". Star Pistol model 1919. "Sindicalista" Model In 1919 Bonifacio Echeverria was interested in the patent of the Belgian Fabrique Nationale on the Colt 1911 pistol. The intention of Echeverria was to design a pistol more to the taste of Eibar. Echeverria created a 6.35mm caliber pistol that served as base for other models. With a frame clearly inspired by Colt and a slide similar to that of the Italian Beretta. By 1929 models with calibers of 6.35mm, 7.65mm and 9mm corto had been developed. The 7.65mm caliber model, denominated the "Model Polícia", allegedly began to be used by the gunmen of the C.N.T in Barcelona and Zaragoza. Supposedly the pistol was carried hung by a string from the belt which went through a pocket with the bottom cut out of it, thus suspended down the inside of the trouser leg, to avoid detection by Police patrols. Code and year of manufacture After 1927