Gl. or Gl.ware Identification and Li.ry. Gl. Pattern Index Gl. Lovers Gl. Database Gl. Company List Marks, Labels, and Signatures on Gl .On these five pages I 've attempted to compile a list of gl. manufacturers ' identification marks found on primarily American bottles and jars. These marks are .HOME: Gl.making Gl.makers: Bottle Gl. Makers Markings nd names, and other marks and symbols of identification found on bottles are datum .