They date to about 1890 and were made in UK, I used to have a marked one and managed to find a reference too them, I wrote it on a piece of paper which I kept in the vase... sold it 15+ years ago. Naturally I cannot remember who it was now. They come with red, blue and green base colouring and always with creamyish exterior and sold by a London retailer. The moulds were made/based from/on branches.
They are not so bad in the flesh Ivo.