John, the item on the top left is for a Mec 650 reloader. They used to [ not sure if they still do ] give you that part and a resize adaptor to keep the shell above the carrier. The bottles have to be removed and the primer tray removed - all you're doing is resizing. For a 600jr the support tube is threaded on the outside - 650's inside. I'm guessing but the top right looks like a support tube and resizing ring for a 650 - the resize ring goes on the other end [ long threads ] with the lock ring to keep it in place once adjusted. The item in the middle may be a early deprime punch.
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Paul Harm
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