Sealed 2009 Comparison Package 33 1/3 10 Inch LP Plus 45rpm 200GM Deep Groove 12 Inch LP. Classic Records Started With The Original Session Master That Includes Alternate Takes Of A Few Of The Tunes Recorded In March 1952. The Tape Is A 15 Ips 1/4" Full Track Mono On Scotch 111 Tape Stock. The Tape Is In Great Condition For Being 50 Years Old And Represents An Important Piece Of Jazz History. The Sound Is Vintage And Lush And Was Not Limited As It Is Obvious That The Original Pressing Used For Comparison In Mastering Was. The Pressings Were Done At Erika Records In Los Angeles On Vintage Manual Presses That Feature No Groove Guard And The Classic "Deep Groove" That Blue Note Collectors Seek Out As Most Desirable. Classic Records Worked Very Closely With Erika Personnel To Help Improve Consistent Quality Across Pressings, Which Is More Difficult With Manual Presses Than With The Fully Automatic Presses Utilized At RTI.