"900" content stamp is below the crossed laurel branches. Type 5 - (1973–74) Bronze, silver-plated. Type 6 - (1974–76) Bronze, silver-plated with outer ring around State Seal on the GDR flag on the obverse. Type 7 - (1975) Same as Type 2, but with outer ring around State Seal on the GDR flag on the obverse. Type 8 - (1977–83) Same as type 4, with " -UND-", 34.7 mm in diameter. Type 9 - (1983–86) Same as Type 5, 35 mm in diameter. Type 10 - (1986–90) Same as Type 6, grain stalks in the NVA emblem are stylized and closed. 5-Year - Bronze Type 1 - (1956–59) Bronze, with serial number on reverse. GDR flag on the obverse without the State Seal. Type 2 - (1960–74) Bronze, no serial number. Flag on the obverse with State Seal. Type 3 - (1974–76) Bronze, with outer ring around State Seal on the GDR flag on the obverse. Type 4 - (1977–83) Same as type 3, with " -UND-", 34.7 mm in diameter. Type 5 - (1983–86) Same as Type 4,35 mm in diameter. Type 6 - (1986–90) Same as Type 5, grain stalks in the NVA emblem are stylized and closed. The first style, used until 1959, has the GDR flag without the State Seal. The second style, used from 1960 until 1974 features the GDR flag with the State Seal. However, there is no outer ring around the seal. The final variety, used from 1974 until 1990 features a ring around the State Seal in the GDR flag. The 20 year medal also has three distinctly different obverse designs. The first type featured colored enameled flags. The second type featured colored lacquer applied over a pebbled finish on the flags. The third type was similar to the second except that the metal finish under the lacquer is smooth. See also Awards and decorations of East Germany National People's Army References Taschenlexikon Orden und Medaillen Staatliche Auszeichnungen der DDR, VEB Bibliographisches Institute, Leipzig, 1983 Standberg, John E., Auszeichnungen der Nationalen Volksarmee Part II, Die Nationale Volksarmee Issue No 11, Spring 1996 Pickard, Ralph, Stasi Decorations and Memorabilia; A Collector's Guide, Frontline Historical Publishing, Lorton, VA, 2007 Orders, decorations, and medals of East Germany Awards established in 1956 Awards disestablished in 1990 1956 establishments in East Germany 1990 disestablishments in Germany