The end pieces are made of heavy plastic and slide off easily once their tiny screw are removed. Then the core of the melodion slides out.
The reeds were in good shape. I carefully cleaned them with a toothbrush, using a paste of baking soda and water, and then thoroughly rinsed with water. This instrument had no unpleasant odor. It seems to have been in use.
All these early Suzukis were made in Japan, despite this label, and this is not the most elusive of all Suzuki melodions.