Picked this pair up today for a fiver. Post war issue but pretty cool with luminous marker strips on them. Both are dated, 5/79 and 10/01. The mount on the back rotates so they can be set at different angles and also have a belt clip.
Typical applications for both are: arc of fire marking, trench identification, path and spot marking and mine marking. Self-luminous route and defile markers can be mounted to almost any object along roads and through forests. Typical applications are minefield safe lanes and bridge defiles for vehicles and troops, where secure route marking is needed in daylight and darkness.
I will use them as North arrows in photographs for my archaeological work instead of the homemade wooden I use at the moment.