Description

Military Mk V Heliograph Signalling Mirror in Original Tin.

The heliograph is a wireless telegraph that signals by flashes of sunlight reflected by a mirror. the flashes are produced by momentarily pivoting the mirror or by interrupting the light beam with a shutter.  The mirror flashes can be seen up to 20 miles away.

Contained in the tin are two mirrors.

Signalling was key to a successful military operation.  Early methods of signalling included flags, lamps and heliographs.

A small but important item of military history.

Size 14cm diameter.  1.5cm high.