I have used the word 'Page X' when it was in combination with say the word 'Section Y' or other information that would make simply numbering ambiguous. This has mostly been in technical manuals. I write 'mostly' just in case there was an instance I used the convention in other than a technical manual.
But I if the header string is not ambiguous in meaning by an average reader, I wouldn't use it.
I think it looks amateurish. Sorry!
(50 years spent in book publishing.)
Much Better now.