Vintage 80s design compass pyramid bookcase shelf

A designer shelf from the 80s. Ladder upright in black metal. 4 shelves in black and gray laminated wood. The upright folds or disassembles into 2 parts. One shelf is slightly veiled. The edges of a shelf are peeling off and it is damaged (splintering) at the fixing holes. Modular furniture shown in the photos with 3 or 4 shelves. Height: 172 cm. Maximum height X depth: 180 cm X 35.5 cm. Shelf dimension: 150.5 X 30 X 2 cm.