is cine film? - identifying your format
marked the introduction year by Eastman Kodak of the revolutionary 8mm
film gauge, known as Double Run 8mm or Double 8mm movie film (also as
Double Regular 8mm, Regular 8mm, Standard 8mm or Normal 8mm). This film
gauge was clearly based on its 16mm big brother, and had an additional
sprocket hole added, with a frame size 1/4th that of 16mm film.