A wonderful french curiosity! 
Each of these delightful wooden boxes hold a selection of folding pince nez or wire spectacle frames from a long gone era! 
The boxes alone are glorious in their own right with their original labels, which is on both sides, so make a lovely decorative piece. 
Then once opened reveal a complete spectacle (see what I did there)?
𝓟𝓵𝓮𝓪𝓼𝓮 𝓷𝓸𝓽𝓮 - 𝓹𝓻𝓲𝓬𝓮𝓭 𝓲𝓷𝓭𝓲𝓿𝓲𝓭𝓾𝓪𝓵𝓵𝔂
Measurements: 15 x 8 x 3.5cm