Vintage VW Beetle cross section

I absolutely love old VWs, and I have had several from '62 - '74 beetles and campers. Now I live in London it is unpractical, but I still want another one!. This is a lovely cross section image I found in a charity shop in Highgate. I presume it is from a '65-'67 handbook (you can tell by the lights and larger front screen and back window!), but I haven't taken it out of the frame, love it!