This one is supposed to be a Relief 66 (at least according to the band which says: "Relief - No. 66 Medium - Including Tax 10/1 "). Actually all the characteristics of the Relief 66 are there. The large gap between the band and the cap lip, the metal top inscribed "Relief" (see Brian I studied your stuff), and the inscription is MADE IN ENGLAND.
Brian, is the 66 not inscribed "Relief-66" in analogy with the Relief 90?
Also why does it say "Including Tax 10/1", I though 66 means 6 shillings and 6 pence? The 10/1 is confusing. What does it mean if not price?

Anyway this pen came with this 1314 nib - one of the more unusual and the most (or only?) sought after of the 1xxx series. A soft ("flex") relief stub. The nib here is shown with a flat feed and it has a pin - I will try to get a good picture and show it.

But I thought that this next one might fit it better
