P75 contains most of Luke and John, known as Bodmer 14, 15 (P75), dates from 175 C.E. to 225 C.E. It is textually very close to Codex Vaticanus. A handful from the 19th and early 20th centuries argued that Codex Vaticanus and Sinaiticus manuscripts removed the Byzantine text readings. However, if this were true and the corrupt Byzantine readings were early as some claim, we would have those readings in P75 to prove it, as well as the other 60+ papyrus manuscripts dating from 100-300 A.D.
The discovery of P75 proved to be the catalyst for correcting the misconception that early copyists were predominately unskilled. As we elsewhere on our blog earlier, either literate or semi-professional copyist produced the vast majority of the early papyri, and some copied by professionals.