sentences:  The coat of arms was changed at this point, and a new version of the £M2 definitive was issued in 1976 to reflect this.Other decimal currency definitives depicted the history of Maltese industry (1981), the Maltese Islands' natural and artistic heritage (1991), and flowers (1999–2006).The 1981 and 1991 definitives were each issued at one go, and in 1994 some stamps from the 1991 definitive were issued in booklets.