Original vintage engine instructional wall sheet 1950

Original vintage 1950's engine instructional wall sheet. Poster is printed in bulgaria in 1950's and text is on bulgarian. It is instructional sheet which was used for training in how engines works. Very nice graphics, lot of details. Poster is authentic, and in good condition for its age. Format is 86 X 65 cm, 34" X 25.5" Almost impossible to find same, great for bar, loft, office decoration. Worldwide shipping with tracking number.