Any person who knowingly sells, offers for sale, transports, or possesses any destructive device is guilty of a Class 4 felony. If such person has been previously convicted of a crime of violence in this state or elsewhere, the offense is a Class 3 felony. Source: SL 1972, ch 140 , § 2; SL 1976, ch 158 , § 14A-1; SL 1977, ch 189 , § 37; SL 2005, ch 120 , § 270.