Number of pictures
The number of photos that you can take depends on the size chosen: the type 120 film can take 12 pictures of 6 x 6 cm, and 15 pictures of 4.5 x 6 cm.
Unused roll film is sealed with a paper seal. If the roll film has been exposed already, you will see that it’s taped back up in differently. If you’re not sure whether the roll film has already been used, do not try to open the seal because daylight will expose it and render it unusable.