CD 133.4 ……Patent Dec. 19 1871…..."E" ….. Nice old and thick piece of Telegraph glass. Light blue-aqua with a good bit of champagne bubble action going on. This piece was absolutely in service as it has wire groove rub-marks to prove (rear and side). There is a small scuff mark on the rear of dome, right of the #3, no glass missing. Otherwise in nice shape for this old soldier. Tough "E" embossing. $65 plus actual postage. I can provide insurance if you wish at cost as well. I package all my insulators very well for shipping. If for some reason you are not satisfied, you can return- just pay return shipping. I think that is only fair when buying online. Payment via PayPal "friend mode" or check.