Warped perforations on one edge, possibly caused by faulty equipment; Dirt, and dirty splices, especially in the first feet of the films (in this sample it is also appreciable what seems to be color fading on the film edges);
Orange dots on the image of a B/W film (I have seen photos of similar damage on B/W microfilm, known as “redox blemishes” or localized zones of silver corrosion); Image and perforation breakage.