This is pretty old but the blade rotates too freely.
The screw that looks like it should loosen/tighten it, turns seemingly for ever but doesn't achieve anything.
The metal label reads Scintilla SA Switzerland and gives this part number: 0 603 230 003
The (worn) label on the side of the body reads "Bosch".
I would like a user guide/manual before giving it an anaesthetic but I cannot find anything useful on the www.
What would be a good next step?
TIA