Those are among the finest looking Fenwicks. Sweet!

No idea on the reel seat. My FF90 has a similar shaped seat, but different color. Sorry no help

BUT I have to say that is a beautiful rod...Very Nice!

Winding check appears to match color of reel seat - very pretty indeed!

Very cool Fenwick! Markings look like those on Fenwick factory rods, but from the cork check to the butt cap it looks custom. I wonder if the check, grip, and seat were replaced? In any case you have fine rod. Enjoy!

At that time, OEM suppliers often sold the identical product--reel seat in this case--on the retail/wholesale market to other customers, anything from hobbyists to small custom makers. I have the identical seat, new-old-stock I got somewhere, that I happened to use on a yellow Fenwick build a few years ago. It was a common seat of the time, but unless the OEM customer ordered a brand-specific touch (an engraved logo, for instance), the seat doesn't necessarily indicate factory vs. custom. That's a Fenwick for sure, but in some cases you could find the OEM seat used on similar rods as to other hardware and cosmetics, but of completely different brands. Essentially, they were just assembled from the same OEM parts bin.

The anodized colored parts of the time, as well as different production lots of the same product, usually account for color differences even at the time, let alone decades later after weathering. That is a relatively large diameter seat for a short rod, so possibly that is a factory rod with just the seat replaced at some point. But again, remembering parts availability and manufacturing practice at the time ("We reserve the right to change specifications without notice") it certainly could be a factory rod all the way, even if not many of that model were produced with that seat.

I don't know why, but I seem to think that is an Allan Manufacturing seat. Or possibly Featherlight. Or Calair, which I don't know how to spell. Obviously, not sure.

The FF60 is a sleeper, I think. Really sweet rod. Incredibly light and a lively action. That one is gorgeous.

So I just bought a new to me FF and was reading up on the winding check, which is different shape and color from all my other FF’s.
Anyway, I came across Lunker75’s query from a few years back and figured I’d add some “color”. Below are a couple pics showing the reddish/orangy, flatter-than-typical winding check. It’s a D FF79 in good shape. Everything else looks original (tube, sock, seat, handle, etc) so I assume everything is.

I have 3 Fenwicks from 1963, FF90, FF84 & FF79 The 84 and the 79 have the same seat, just different colors. The FF90 looks more like the one in the OP but different color and threaded more than 3/4 of the way down to the butt. Pics when I can get home and take some.