Needing some help...

[jamesj]

So I got a yashica and well the first roll seemed fine, but some of the pics had a light streak across the left side of it.

here are the examples:

does anyone have any ideas why these are turning out this way?
all the other pictures are fine.

 

[Dfin]

G`day James, I`d say the light seals need replacing also check lens coating.

 

[bsdunek]

Look at the seal at the back hinge. Mine had a little crack that resulted in the same thing.
In any case, if the seals are old, just do a complete replacement. You'll be happier.