I have handled hundreds and hundreds of CD 104 New Eng Tels over some 40+ years in the hobby. Every once in a while something will stop and make you take a second look . This one has not only strong but, what seems to me, an especially large embossing. So if you are adding another CD 104 New Eng Tel to your collection or if it is the one and only, it will be a standout. $15 will buy the insulator and the shipping too.