053X0671-001 Wells Gardner K7400 and K7500 series monitor Flyback Transformer NEW. 25″ and 27″ chassis. Supersedes 053X0651-001. If your original flyback has a black wire wrapped around the ferrite core do not transfer to replacement flyback. NOTE: We have some redesigned flybacks that are made with a dual focus boobin which we have found to be better, but you only use the top focus pot on it as the middle one is not active nor used.