Here is a CD 196 embossed No 51 over H.G. CO. and on the reverse is PAT. MAY 2 1893. The color is a very deep blue/aqua. The base drips are in perfect order. There are two partially chipped drips (side by side) on the shoulder. In the photo you can spot most of the trouble spots. There is a 1/4" dia shallow chip on the dome. Another on the edge of the shoulder and 1/2" chip on the inside of the shoulder drips just to the left of the embossed H. There is a small bruise on the edge of the shoulder above the 1893 and two small flakes on the edge of the shoulder. I do have other photos if you are interested. Most of the damage is easy to overlook because the overall appearance of the insulator is outstanding. I do believe that the No 51 is harder to come by and the condition of this piece is extremely good. Priced below low book at $115.00 plus actual shipping cost. I JUST TOOK 30% OFF MY ORIGINAL PRICE......NOW $80.00 PLUS ACTUAL SHIPPING