A rare Royal Ediswan neon beehive light bulb

I think dating from the 1940's 

In working order as shown.

Marked; 200-220V, Royal Ediswan, Made In England, 10 on the base.

A slightly different design internally to the more commonly found UK made Osglim.

Will be carefully packed.

Shown in a 1948 catalogue

Any questions - please ask