I'm guessing these are both EMs? Or do you have the SS version of Hot Tip?

Its the SS Version of Hot Tip.

Now that Blue Chip is the famous one in The Pinball Compendium 1970 - 81 on page 92 

Hi Tony - Are you saying its the Actual one pictured? I will have to dig up a copy and have a look.

Good luck with the search for the Touchdown.. The only Touchdown I've ever seen is the Williams EM - Which I used to love playing as a kid..

Yeah I remember playing that one as well. The reason that I am particularly looking for the 1984 Touchdown is that a while back I bought one of the original signed design mylars (non-adhesive) of the playfield done by John Trudeau. Sometime this year I will get it framed with some pictures etc for the Games Room. Nothing would compliment this more than the actual pinnie to go with it :)

Mark