Ultimate 13CD box set release from The Beatles. As the title name indicates, this box set contains the monaural versions of the band's 10 albums. A double-CD "Mono Masters" is also included in addition, which is the monaural counterpart to "Past Masters."

Other remarkable features of this box set are the original 1965 stereo remixes of "Help!" and "Rubber Soul" included as bonus tracks. Features the cardboard sleeves faithfully replicating the original sleeve cover designs and inserts (subject to change). The box features Japanese Obi. The CDs included in this box set won't be sold separately.

*Please note that although the picture above does not show "Mono Masters," it is included in the box and all details subject to change.

*Encore edition has no difference with the former one except the color of Obi (white > black).