According to Darlow and Moule, the “most accurate and best equipped” polyglott bible.

In completing this monumental undertaking Brian Walton (1600-1661) had the help of nearly all contemporary English scholars, particularly the Orientalists Edmund Castell, Thomas Hyde, and Samuel Clarke. The excellence of this Polyglot over others consists in the greater number of translations of the Old Testament from many languages, and the much greater and more intelligent work of the editor. For example, Walton’s apparatus, a critical-historical introduction in volume one was not superseded for more than a century, and was several times republished.
The first four volumes contain the Old Testament in the Hebrew with the Antwerp interlinear version. These texts form the Old Testament with their translation in Latin and Greek are arranged side by side or one under the other. The New Testament appears in volume 5, the text with few changes from Robert Stephen’s folio edition of 1550. Edmund Castell wrote in his Lexicon Heptaglottum that this Bible was “probably the greatest and most perfect work of the kind ever performed by human industry and learning”.

The publication dates on the title of Vols. I & VI and colophons of Vols II-V may be slightly spurious as COPAC notes that “although dated 1657, the work was printed between 1653 and early 1658. It was apparently published later in 1658 though some copies were not issued until after the Restoration in 1660. The copies have a variant form of the preface (cf. Darlow & Moule)”. The British and Foreign Bible Society’s Historical Catalogue of the Printed Editions of Holy Scripture, 1911 (Vol. II, p.26) also gives the dates of publication of the Bible as 1655-57, the whole being issued in 1658, although Vol.I. had been completed in 1654. This may be the source of Darlowe & Moule’s assertion.