What does the old school tie actually look like?

[ladymoondancer.livejournal.com]

I have been scouring the internet trying to figure out what colors the Eton school tie is/was and coming up empty. They did HAVE one, right? This isn't the fever-dream of a disturbed brain, is it?

(I'm talking about the necktie men were allowed to wear after they graduated, not the dress code tie, if they have one. Unless, of course, they are the same thing.)