Vintage stacking chair by Gerd Lange for Drabert West Germany model SM 400K

Vintage plastic and metal stacking chair by gerd lange for drabert west germany model sm 400k, I think these are from the 80s.condition is good, used but not abused.red fabric is new. Measurements are ca: 77 cm high X 45 cm wide X 55 cm deep the seat is at 47 cm ! Weight 5100g. Two chairs can go in a 20 kg parcel dhl germany. Sku: 256022l.