Here is an odd one for you that I pulled off a pole the other day. It is a CD 151 smooth base H G.CO. ( F-Skirt ) ( Missing the period between the letters " H " & " G " ). Just below that is a hand scripted Capital letter " A " with a space then a small capital letter " D " with an embossed " dot " then another Capital Letter " A ". The spacing between the small capital letter " D " is the same with both Letter " A's " and the dot is centered between the small letter " D " and the letter " A " to the right. Then below the last period in " CO. " there is a Number " 3 " followed by a Capital Letter " S ". Never seen one like this and does any one in ICON land knows what these embossing are or mean ? Next couple of photo's show all of the embossing. Want to say Thank You to all that have responded on the odd embossed lettering. After looking closer I have been able to see the blot out rings in the glass where the rest of the patent date should be.