Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, if any employee of a participating employer who became a member of the Kansas public employees retirement system on January 1, 1962, was first employed on July 1, 1934, through June, 1937, and was reemployed by the participating employer on June 1, 1939, through September 6, 1944, and was reemployed by said participating employer on November 1, 1961, he shall be granted prior service credit for all service with said participating employer prior to January 1, 1962, whether continuous or not. This additional credit shall affect only those benefit payments due after July 1, 1969.