20 Set

Construments Ltd.

London

England

Sets of interchangeable parts that can be put together to make a variety of optical devices. Instruments that can be made with this set include: Pin-hole Camera, Lens Camera, Photo Printer, Darkroom Shadowgraph, Kaleidoscope, Enlarger, Epidioscope.

Notes:

Address: 18 Gray's Inn Rd.

Plus Set

This turns the 20 Set into a 100 Set. Extra instruments are: Microscopes, Midget Camera, Magic Lantern, Telescopes.

Instruction Book

With leaflet.

'How to Make & Use Scientific Optical and Cinematograph Instruments'

The illumination is provided by a bulb and battery that must have made the projection devices disappointing. Other outfits were produced for scientific amusements. A 200 outfit, brought out after the 20 and 100, provided cinematic projection for both 9.5 and 16 mm films.

References & Notes:

BJA 1933, p. 602. BJA 1935, p. 613.

Early Photography