Original vintage pull down school chart Siemens - martinova furnace, steel For Sale

Original vintage pull down school chart- educational map - School PosterSiemens - martinova furnace, steel production
90 x 60 cmCzechoslovakia
O R I G I N A LTake note of the poster is very old, contains signs of use such as scratches, light soiling, kinks and cracks.Sometimes a piece missing see photo.It comes from my private collection,Only one shipping for all sales .Posters are sent together for one Shipping costs.