forums.insulators.info

Posted: **Thu Apr 01, 2010 12:44 pm**

I found this in a box. I do not know if it is common or not but it is the first U2421 I have noticed with an incised CP followed by any number. CP 8

Posted: **Mon Apr 26, 2010 7:09 am**

Hi James:
I think the newer U2421s have a date? after the embossing. Not all of them, but a few do. I've seen 77 and 78 after the CP logo.
Robin

U2421