This one is embossed up around the top edge: HICKOCK'S PATENT/1859. You can partially see the 18 up at the right. The color is a cool milky green, some would say 'jade'. It looks incredible in person! See also this previously posted milky Hickock photo [id=136577547] The patent by Russel Hickok can be viewed here: http://reference.insulators.info/patents/detail/?patent=U-23373 Neat Hickock group photo here: [id=136796587] Enjoy! Oh, that is a crack up in front from the base upward.