Sorry, no idea - it looks semi-double and I don't think I've seen one like that before.

it is really weird as the trumpet has lots of frilly layers and the outer layers also seem semi double too. all the same colour too.

I wonder where the National Collection is...you could send them a picture perhaps?

Cant help but think it looks like Golden Ducat to me, but i could be wrong..

Hmm, second thoughts, probably not..

i've just googled it and the trumpet on mine stays 'tight' so I dont think it is but thanks for the suggestion Steve.

Hadnt thought of a national collection. good idea sid.