Light blue tinted glass Atlas strong shoulder 1 quart canning jar. The jar is cylindrical with round shoulders and threads at the top for a screw lid. Mold seams on the side extend from a horizontal seam at the bottom up to but not over the lip. There is also a horizontal seam where the top and base are joined. Embossed on the side "Atlas" "strong shoulder" "mason". On the bottom is embossed "C" inside a circle that may be another seam.
