This is a CD 321 that has the following embossing....REGISTERED over TRADE MARK over an embossed Prism. On the reverse side if the umbrella and lightly embossed is "PATENTED JUNE 17, 1890". The color is actually a blue-aqua. This photo is a bit on the aqua side so expect a more colorful insulator than shown. Now there is a quarter size shallow umbrella chip around on the left side and also a small chip on the under edge of the umbrella on the right side. $25 plus shipping.