Public [act] 350-442, 72d Congress. Revenue stamps. H. R. 12977, to amend sec. 808 of title 8 of revenue act of 1926, as amended by sec. 443 of revenue act of 1928 [so as to provide that revenue stamps will be on sale in all post offices of 1st and 2d classes and such post offices of 3d and 4th classes as are located in county seats].