This is a lovely vintage enamel box, manufactured by Halcyon Days in the 1970s it has Bilston & Battersea included in the name. It displays two Royal Warrants - One for Her Majesty Queen Elizabeth and another for her Mother.
This appears to be a rarer enamel box and would make a lovely gift for a collector or for a bird lover. 

The lid and sides are decorated with exotic birds, possible parrots on a green background. Inside the lid is a monochrome image of a bird on a branch. 

The box measures approx. - diameter 2" x 1½"(5cms x 4cms) & height 1"(2.5cms) 

It is fully backstamped and in excellent vintage condition. There is a tiny spot in the enamel on the base which I am pointing to in the photos, everywhere elsi it is free from any damage or wear. The metal mount has dulled over the years. The snap clasp is working and is very good and still shuts tightly.

I am currently listing a collection of Halcyon Days enamel boxes, so please take a look at my other items.