Thanks to those that have tried to help. I can not comment on whether it is important or not, but as it appears both in the CAA aircraft technical and ATPL syllabi, it would be convenient to have a technically correct answer.
I have found two references that agree with Bristol’s version, one of them being Thai technics, but again are they authorative? It really does seem to be in the wording at this point, with the “pressure face” being the “back” or flat side of the propeller and the “thrust face” being the “front” or cambered side.
Still searching !!!!
