An Act amending the act of July 3, 1947 (P. L. 1242, No. 507), entitled "An act relating to police and firemen's pension funds in cities of the second class A, and directing such cities to appropriate certain moneys thereto, and requiring reports and audits," and the act of September 23, 1959 (P. L. 970, No. 400), entitled "An act providing for the creation, maintenance and operation of an employes' retirement system in cities of the second class A, and imposing certain charges on cities of the second class A and school districts in cities of the second class A," further providing for credit for military service.