If you're an uncompromising collector of antique technology, make sure to check out all my listings after you look at this one. I don't think you'll find a better, broader or more balanced assortment of technical antiques anywhere -- hundreds of listings each year, almost all of them featuring eye-popping "gee whiz" gadgetry in exceptional original condition. And don't forget, you can click this link to quickly add and then save me to your favorite seller list and Ebay will automatically send you updates when I put similar new listings online.

Here's a Grigg's Conical Electro Magnetic Machine, an early and unusually designed shock apparatus manufactured in Plymouth, England in the 1870's. 

Condition is good, and the apparatus is original throughout, with normal signs of wear consistent with age and authenticity. 

Measures approximately 9" x 5" x 5". Shipping weight, properly packed, will be about 10 lb.

I'm one of ebay's best known, most highly regarded sellers of technical collectibles and technical antiques. I've been selling and shipping them for more than 25 years. When you purchase an item from me, you can rest assured that your purchase will arrive safely because it's been carefully packed (by me, not by some well-intentioned but nonetheless confounded, doe-eyed teenager working at the UPS store who wouldn't know a radio from a radiator), Sure, you can probably get a lower price from Joe and Janet Barn-Find, but when your "bargain" arrives broken, and without any hint of how you might be able to put it back together, you'll realize that you really do get exactly what you pay for.