On flea market I found old Kodachrome 35mm film, so I paid 1 euro and got it just that it does not sit there in the dirt (maybe I will shoot it and develop in B&W). I opened and I see that film has longer leader, just to fit Barnack Leica. Is this made for that, or some other reason for this in kodachrome?

Interesting is also that film expired in 1977, and price was 15.90 DM (deutsche mark), developing included.