Picked up this nice little Brooke's Blue CD 120 not so much for the color as for the patent date which is my birthday, Aug. 14. I guess if I had Bill's electronic price guide I could do a quick search for all insulators with an Aug 14 embossing, but the only other one I know of is the Chambers CD 317 (and the 317.5 of course). If someone with the electronic guide could search and let me know if there are others I would greatly appreciate it.