Y Not Antiques has dated this piece to the 19th Century.
All measurements are Width x Depth x Height from longest part.
Inches 39 x 1 x 53 (open)
Inches 19.5 x 2 x 53 (closed)
cm 99 x 2.5 x 134.5 (open)
cm 49.5 x 5 x 134.5 (closed)
Y Not Antiques has dated this piece to the 19th Century.
You can view the stock and full dealer information on the Y Not Antiques Profile Page