When did proofmeters go into 8N's?

Posted by Dennis Sherman on April 28, 2008 at 14:24:25 [URL] [DELETE] :

I just recently bought an 8N (I think the serial number is 352713 - which would put it around a '51). But, I don't have a proofmeter nor a hole for it. When did they start including proofmeters in the 8N's? Should I have had one?

Follow Ups:

Re: When did proofmeters go into 8N's? - Ed Gooding (VA) 08:12:47 05/04/08 (0)
Re: When did proofmeters go into 8N's? - Gary__Sarge 11:51:32 04/29/08 (2)
- Re: When did proofmeters go into 8N's? - Dennis Sherman 12:01:09 04/29/08 (1)
  - Re: When did proofmeters go into 8N's? - John (TR) 21:22:15 04/30/08 (0)
Re: When did proofmeters go into 8N's? - John D 14:46:43 04/28/08 (1)
- Re: When did proofmeters go into 8N's? - don b 16:30:15 04/29/08 (0)

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