LARGE MID TWENTIETH CENTURY VAN DER GRAAFF GENERATOR - Griffin and George. Van Der Graaff Generator by Griffin and George. This is a mid Twentieth Century Van Der Graaff Electrostatic Generating circa 1950 - 1972 by Griffin and George. Producers of demonstration scientific equipment.This is a full working machine though needs careful adjustment to set up properly. When adjusted and used on a dry day - it produces immense forking sparks of up to two feet in length. It measures, 75cms in height and about 27cms in diameter, The parts include a brushed aluminium dome a steel base with a gunmetal paint surface, acrylic tube and a rubber belt, the contact brushes are made of brass gauss. A classic retro design with solid components ideal for collectors. This item is in the category "Antiques\Science/Medicine\Scientific Instruments". The seller is "cummings707" and is located in this country: GB. This item can be shipped to United Kingdom.