Gecophone Early Radio Help wanted

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To me the sets value is not really a factor as its a hobby and an enjoyment to get old sets and make them work rather than get them for just how much they are worth.
I am going to have a look out for some coils at a few radio rallies as I had luck at these before.
Most of the coils I have are two pin with a large and small pin, has anybody come across a four pin base before????

Many Thanks
Luke