It’s not very often I get to combine two of my absolute favourite things in one post: Doctor Who and transit maps! Without giving too much away (spoilers, sweetie!), the tin is presented in-story as being from 1967, and it looks like the BBC props department did a pretty decent job. The map shown on the tin is indeed Paul Garbutt’s 1964 map, which can be differentiated from the very similar 1970 map – even on-screen like this – because of the enlarged “U” and “D” in the “UNDERGROUND” roundel. By 1970, all letters in the logo were the same height.

There is actually a very clever point to the exact dating of the tin to 1967, but again… spoilers!