Vintage folding second-hand bookshelf

Vintage folding second-hand bookshelf from the 70s. To stand or hang (system on the back see photo) 3 shelves which fold down to internal dimensions of 67x27cm. Space of 30cm between each and 14cm between the ground and the last one. Practical, robust and very clever due to the fact that it is foldable. In very good condition, very few marks or signs of wear (normal due to time) Dimensions when folded: height 94cm. Width 70cm. Depth 6cm. And unfolded depth of 29cm.