Don Barker proposes a wider and earlier range of dates for Papyrus 88, along with Uncial 0232, Papyrus 39 and Uncial 0206; and states that all four could be dated as early as the late second century or as late as the end of the fourth century.
^Barker, Don (2009). "How long and old is the codex of which P.Oxy 1353 is a leaf?" in "Jewish and Christian Scripture as artifact and canon" eds Craig. A. Evans and H. Daniel Zacharias. London: T&T Clark. pp. 192 to 202. ISBN0-567-58485-2.