exploding instruments…

Trying to pick different things, this caught my eye. From a far I presumed this to be a fountain pen, but picking this up I can now see its a A Yard O-Led exploded pencil within a solid perspex cube.

This type of display feels fairly modern – I presume its a point of sale from a retailer somewhere. I have googled without success – but confident I’ve seen this exact same thing in a shop shop fairly recently.

Does anyone know the history of this and what the symbols mean. I confess I do not know anything yet about pencils – can anyone identify the model?

At least the pencil will be in good condition!

Engraved on top is “YARD-O-LED” and at the bottom “HANDCRAFTED IN ENGLAND – HALLMARKED SOLID SILVER – YOL” and then I have to confess I don’t recognise the following symbols or logos.