THE STANDARD GLASS INSULATOR CO. BOSTON MASS.

These are the standard STANDARD CDs listed in standard CDbetical order. They all have the same base embossing. Only the CD 268.5 has additional embossing which is on the skirt. It says "PATENTED / AUG. 8, 1893.

CD104, CD 114.2, CD 121, CD 138.2, CD 145, CD 157.5, and CD 268.5.