Originally Playmobil had the chassis (the internal skeleton to which the legs, arms and head attach) matching the leg color, but later all the chassis were switched to semi-translucent white. I don't know why they made the change, other than to simplify the manufacturing process, or maybe the colored plastic chassis became brittle with age. The color matched chassis looked better.
The klicky with the white chassis is the more recent version of the same figure.
That hook is definitely not an original moulding.