Hi booklands, Your piece is the 'Bracelet Branch' by Wedgwood. Called 'Pesce' it was available in Clear and your colourway, 'Midnight'.
The same design only smaller, About 3.5ins, called a 'Ring Swing' was available in the same colourways and the same name, 'Pesce'.
This information is in Susan Tobin's book on Wedgwood Glass.