Lego - Technical set 852 for a helicopter, boxed with instructions dated 1977; and approximately 6kg of loose Lego sections with various instruction leaflets. - Toys, Diecast Model Cars, Dolls & Vintage Teddy Bears
Early Technic Set 852 helicopter from 1977 : r/lego
LEGO 852 Helicopter Instructions, Technic
Retro Reconstruction – 852 Helicopter 1978 | The Rambling Brick