Antique demonstration device from an electrical/ physics laboratory

Description

Antique electrical device probably used for demonstation purposes in an electrical/physics laboratory. Marked "NUR ANSCHLIESSON AN: 240 volts Wechselstrom" 17" long,3 1/2" wide, 3" thick. I'm selling this for parts or repair. (someone told me the literal translation of the above is "Do not look into laser with remaining eyeball." but I think they were probably joking.)
Now, for the Fine print:
I'm not an expert on many of the items I sell on eBay.   I try to do a very good job of listing everything I sell in a very accurate manner to explain all the good and bad points with the pictures and in the description.  Please feel free to ask any and all questions, I will even answer questions that are already answered in the description although your intelligence may be questioned :)   I am 100% certain that no one NEEDS any of the items I sell to meet any basic needs of life.  With that said I am selling these items for the money and if you cannot pay, think you might not be able to pay, or do not want to pay please bid on items owned by someone else..  If you haven't caught on this is supposed to be mildly funny but yet serious at the same time.
I do not end auctions early—its not fair to the other bidders. Most of the items I sell come from estates and I sell them in “as found condition” – I leave any cleaning or “enhancement” to the buyer. Please check the pictures –they are probably the most important part of the description.
If there is a problem with any item you purchase from me, let me know immediately, I'm sure we can work it out to your satisfaction.
Occasionally eBay calculates some wildly inflated estimates for shipping costs, if the estimate doesn't look right, contact me for confirmation. I always specify USPS priority Mail – if you would prefer another mail rate, please let me know. I never charge more than the actual postage cost..
Thank You for your interest.