I WILL OFFER THE BEST IN COLLECTING. WATCH EVERY WEEK FOR GREAT FEATURED ITEMS. THIS EXAMPLE IS IN NICE CONDITION. THESE UNITS DO NOT SHOW UP FOR SALE OFTEN , AND ARE HARDER TO GET. THIS UNIT IS UNTESTED , AND IS MOUNTED ON A BOARD ABOUT 7 INCHES BY 7 INCHES. SO DONT LET THIS ROTARY SPARK GAP ITEM SLIP BY , THEY DO NOT COME UP FOR SALE OFTEN. I HAVE SUPERSIZED THE PICTURES SO YOU CAN SEE EVERYTHING. I PACK VERY WELL , YOUR ITEM WILL BE DELIVERED WITHOUT DAMAGE. CHECK MY OTHER ITEMS FOR SALE Check out my other items. AND PLEASE BOOKMARK RADIOS10467 Be sure to add me to your favorites list. OVERSEAS BUYERS ARE ALWAYS WELCOME. The item “VINTAGE MARCONI ERA ROTARY SPARK GAP With ROBBINS MYERS ANTIQUE ELECTRIC MOTOR” is in sale since Saturday, September 10, 2016. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Other Antique Science Equip”. The seller is “radios10467″ and is located in Monroe Township, New Jersey. This item can be shipped worldwide.