Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, any employee of a participating employer who first became a member of the Kansas public employees retirement system on April 1, 1963, who was first employed by said participating employer on January 7, 1941, until June 6, 1958, and reemployed by said participating employer in a temporary position on January 10, 1962, shall be granted prior service credit upon retirement for said service prior to January 1, 1962. The prior service benefit shall be computed by using a prior service annual salary of three thousand seven hundred eight dollars ($3,708).