No. of pieces: one object recessed into wooden box with detachable parts. Handmade wooden box enclosing a machine molded solid metal object. Plastic machine molded attachment. Gold electroplated metal, wax-matte hand polished wooden box, plastic has either been polished or had a varnish polish added to the surface. Detachable brass elliptical stopper, two brass butterfly screws, two hook latches attached to outside of box to secure object for transport. Polished wood surface, possibly wax coated. Brass metal coated with gold patina/electroplating. Plastic component either polished or coated with gloss varnish. Inscribed on top of the object, in the wooden box: “MICROFARAD/NALDER BROS & CO/WESTMINSTER/No 1509” Paint dot approx. 1.0cm in diameter on top face of wooden box, back edge, towards the right.

Brass and glass case enclosing two sets of coils; surmounted by a vertical rod on which a compensating (?) magnet may be moved either vertically or rotated in a horizontal plane; 3 levelling screws and spirit level.Engraved on top of cylinder: “Nalder Bros and Co., Westminster No. 36521”