A really interesting Georgian puzzle book box.
To open start by pulling one half of the spine up and then the other half of the spine lifts up, the side that swings up the bottom section slides to the side. The other end  of the spine then slides  down and slides out - definitely a more complex opening mechanism than most.
What is  also really nice about this box is in the middle section it has been made to look like a book with the old marbled paper. Small shrinkage split on oneside.
Good colour and patina.
It measures 17cm h x 10.5cm w x 2.5cm d.
c1810/20