Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, any employee of a county who became a member of the Kansas public employees retirement system on the county’s entry date, January 1, 1968, who was first employed by said employer on January 11, 1937, until January 10, 1949, and reemployed on January 11, 1965, shall upon retirement be granted prior service credit with said participating employer for said employment prior to January 1, 1968. The prior service benefit shall be computed by using a prior service annual salary of two thousand twenty-six dollars ($2,026).