WW1 Royal Navy Air Service - Filter Goggles.
Very scarce WW1 R.N.A.S Flying Light Filter Goggle Kit, housed in a custom made wooden case the goggles have a leather face mask with four coloured lenses (Filters) and a green elastic strap, the case holds 16 filters of different colours and instruction book print dated 1917.
It is thought that these were experimental goggles and only a few examples remain, they were to assist with the locating and spotting of enemy ships, submarines etc from the air in varying conditions with the coloured light filters improving visibility.
Condition is excellent taking into account they are over 100 years old, the goggles are in excellent nearly mint condition the strap is complete but lost its elasticity, the 16 spare filters have some slight damage and one is broken could be repaired if required, the instruction book is in sound condition with some foxing and rust bleed from the staples. The wooden case is in very good clean condition.