The earliest and most famous Greek New Testament manuscript is the Ryland Papyrus P52, currently on display at the John Rylands University Library in Manchester, UK. It was purchased in 1920 by Bernard Grenfell on the Egyptian antiquities market. However, it wasn’t really “discovered” until 1934 when it was translated by C. H. Roberts. Three of the leading papyrologists in Europe to whom Roberts sent photos of the fragment to dated it from A.D. 100-150. P52 comes from a codex (ie. book form, not a scroll) and contains parts of seven lines from the John 18:31–33 on the front, and parts of seven lines from verses 37–38 on the back.
— Read on biblearchaeologyreport.com/2019/02/15/the-earliest-new-testament-manuscripts/