An interesting old Coil

[unrealdave]

Unbelievably, I’ve had a day to myself. I’ve got an allwave and two other British General coils – one is in circuit and works well. The one you have is the all wave and my one is broken – ie the selector has snapped off. If you want I could post it to you so you could take it apart (reverse engineer) and play?

I have also looked through the missing editions of 1930 and can’t see it. There is one that is along similar lines though.