It adds miles to your voice

[Adam]

Does anybody have a full-sized, readable version of this Bell Telephone Labs ad?  The copy below is from an eBay listing.

I'd like to see what the ad says, because it relates to the advancements in the new 500 that are also talked about in a very technical way in this document:

http://www.manufacturediscontinued.com/files/500-set-design-1949.pdf

Thanks.