The “KLEENBALL” device for sprucing up old or soiled lawn tennis balls, circa 1915, consisting of two wooden hemispheres lined with short brushes bet

The “KLEENBALL” device for sprucing up old or soiled lawn tennis balls, circa 1915, consisting of two wooden hemispheres lined with short brushes between which the tennis ball is rubbed. Complete with a rare original retail box, box size 16 x 12 x 11cm.