Light leak in bellows...?

I have an old Kodak vigilante Junior 620, which takes some great photographs but looking at the negatives, I have noticed that along one side of the film there is a darker strip. I think this may be the result of a light leak? I can post a sample image later if need be. If it is a light leak in the bellows, how can I find/repair this?

There is bellows patching compound that you can buy, and you'll find numerous other solutions if you search this site. If you really like the camera then you might also consider simply purchasing new bellows.

Check as well that this is not a problem with the camera back (it may not be closing completely).

Also, are you re-spooling 120 film on to 620 spools? You might be having problems arising from that process.

Matt