Report "I have a Praktica sport SK320, Bought from a charity shop. It seems to be working, I have taken some pictures, but I have no idea if there is film inside, I can't see any indication through the tiny window at the back. Does this mean that there is no film loaded. Although it is winding on and flashing? Maybe I should open it to see.I thought that if it wasn't loaded it wouldn't work. Many thanks. Regards Joyce"