At the risk of being scoffed at, there is some logic in using the bottom half of a case to which the neckstrap is attached. This way there is no wear on the lugs on the camera, and in some instances the fact that a case surrounds the camera makes it quieter -- seems to work that way for my Leica IIIa. And of course the (replaceable) case takes the wear that would otherwise be inflicted on the body.