Signed Mathmos/Crestworth Lamp - Personally authenticated by Edward Craven Walker

[Liam]

My friend sent me this picture of his Lava Lamp which was personally authenticated and signed by his Grandfather, Edward Craven Walker.

I said I would ask on this forum about the value of such a lamp. Are they common??

[Liam]

Nobody? Are these signed Lamps rare?

[Keith]

I've been on this site for 4 and a half years and haven't seen one like it, with engraved glass.

Liam Byrne said:

Nobody? Are these signed Lamps rare?

[LampHead]

 Very cool. I have never seen one of these before so I would say its extremely rare.