Chris Willman Senior Music Writer and Chief Music CriticA new recording of Bob Dylan’s “Blowin’ in the Wind” produced by T Bone Burnett and manufactured as a one-of-a-kind disc in a unique format will be sold at Christie’s in London on July 7, with an estimated value of 600,000-1 million pounds, the auction house announced Wednesday.It’s being described as Dylan’s first studio recording of what is possibly his most famous song since he originally released the folk anthem in 1962. The singular disc, in the acetate-like Ionic Recording format, appears to be autographed by both Dylan and Burnett on one side, and comes in a wooden case that marks it as a “one-of-one.”In late April, Burnett announced that he had gone into the studio with Dylan cut a full album of the legend re-recording his classic material for his new company, NeoFidelity Inc, and its Ionic Originals format, which he described as a new development in analog technology.