Is it a Junkers hardwood floor or just any 'hardwood' floor? If the former, please note that one of the good things about Junkers is that it has a very very good laquer finish which you are unlikely to achieve if you re-varnish.
But do you think that the floor looks worn & in need of being spruced up somewhat. Solid floors can be sanded & oiled/laquered/varnished in order to revive.