Viridian is "dead on" with his comment about the Charlie Byrd D-to-D recording on Crystal Clear. When I was a high school student in suburban Maryland in the late 1950's, I took some guitar lessons from Charlie Byrd, and heard him perform live many times at his regular gig at the Showboat Lounge in Washington, DC. I know the sound of Charlie's guitar very well, and the Crystal Clear LP is so realistic that it is startling.
There are some other D-to-D recordings that also have amazing fidelity: some of the big band recordings on Century Records; the recordings of the L.A. 4 on the EastWind label (owned by Yasohachi Itoh, who is now producing jazz LP's on the "EightyEights" label); many of the Sheffield Records titles (although not all have great music); and the limited edition D-to-D LP's on Concord Jazz of the "Great Guitars" trio (Charlie Byrd; Herb Ellis; and Barney Kessel).