Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, any county employee of a county who became a member of the Kansas public employees retirement system on July 1, 1966, following the employer’s entry date of January 1, 1965, and who was first employed by said county in February, 1945, through September, 1946, and was reemployed July 11, 1947, to January 18, 1963, and again reemployed by said county on June 26, 1965, shall upon retirement be granted service credit for all service prior to the employer’s entry date whether such service was continuous or not. The prior service benefit shall be computed by using a prior service annual salary of three thousand eight hundred sixty-three dollars ($3,863).