CONTRAVES PRESS INFORMATION No. 195 e. CONTRAVES TRAJECTORY MEASURING SYSTEM SKYTRACK. 20th May 1983. Ref no. CZ/ZW3/Ms. 210mmx295mm. 4 pages. There are two real photographs stuck to pages. Rusty staple. Slight creasing to corners. Please see listings for other Contraves Press Information sheets, postage is combined.