This clear, narrow mouth glass Ball jar has the original Ball zinc lid with milk glass liner.  The embossed lettering has a dropped a and is underscored.  These characteristics date its manufacture 1910-1923. "Hair lines" appear from the glass processing. Not cracks! This beautiful aqua quart jar has slight wear after many decades of use during home canning and is consistent with its age.  No chips or cracks. Measures 7" tall x 2.5" diam top x 3.5" diam base  Check my booth for other Ball Mason jars.