VINTAGE INDUCTION COIL IN OAK BOX-SEVERAL AVAILABLE-BUILT SOLIDLY-UNABLE TO TEST.  I DO NOT KNOW WHAT THESE ARE FOR SO UNABLE TO ANSWER TECHNICAL QUESTIONS.  I HAVE OVER 10 FOR SALE.   ALL ARE SIMILAR.   THESE LOOK KOOL.  WOULD MAKE KOOL STEAMPUNK DECOR.  NO BIDDING REQUIRED. I DO SHIP VERY FAST.   BUY WITH CONFIDENCE.   YOU CAN BUY IT NOW...