The Orvis rods came quite a few different ways in 7ft based on Phillipson blanks for the years. I have multi piece Spin/Fly rods rated as 7wt, Metal Ferruled two piece models rated 6t which are based on earlier uniglass blanks, not Epoxite blanks which are rated 6wt but really need a DT6wt or WF7wt to load. Then there are those that are based on the late 60s Epoxite blanks with tip ove but Phillipson ferruling. They were wrapped by Orvis and to their standards. I have one, I have no idea how it compairs to yours, mine was in the tube, sock etc all documented as at 5wt. I fish it that way too. Anyway compair this set of pictures to what you have. This rod is a little longer at 7ft but a true 5wt easily handling a WF5wt and equally happy with a DT4wt.
As a post script here, I have several other Phillipson/Orvis rods. Let me say this, the earliest two I have are Phillipson NS ferruled. Im quite certain both (Fullflex and Powerflex) are based on the earlier Phillipson supplied 3M Scotchply uniglass blanks. Same as the Johnson profile series and pretty common to the entire line before the introduction of the Epoxite material. Likewise I have a couple of Orvis tip over butt spin fly rods. Clearly with the Phillipson ferrules. They are rated 7wts, even though 7ft. Frankly I think they are the same 3M Scotchply uniglass blanks, not Epoxites like the Golden Eagle series. They match perfectly my fly fox rods, based on those same 3M Scotchply uniglass blanks!
The last major change was the Golden Eagle series as shown above, purely on Epoxite blanks. Although according to Orvis the blanks were tuned to order for their order. In any case after they discontinued the Phillipson blanks, they rolled their own for a few years, the Fullflex A and Fullflex AII, frankly a common glass blank, like any other, nothing special at all. In fact of the two Ive cast IMHO, very inferior to the entire line of Phillopson supplied blanks. Of course they were offered late in the game and many ealier glass customers assumed they were Phillipsons as well, they were not.
So ended Orvis's experiment into glass rod mfg.