This is a cool insulator that represents a unique color in my collection. Jade Green Milk is a shade best viewed under direct summer sunlight. So instead of using my white background stock photo I decided to head out to the back yard, prop the little green guy in the maple tree and use that golden July sun.
The embossing reads: AM.TEL.&TEL.CO. Today better known as AT&T.
Many, but not all CD 121 Am Tel & Tel Co insulators were made by the Hemingray Company. Examples of insulators with this particular embossing are known to exist in a large selection of colors such as Aqua, Blue Aqua, Light Blue, Ice Blue, Hemingray Blue, Green, Light Green, Lime Green, Dark Yellow Green, Purple tint, Light Purple, Purple, Clear, and Corn flower blue.