Now for what’s inside.
The P-37E disassembles exactly as the P-37D does. At first glance, once the inner melodica is removed from its enclosure, everything looks pretty much the same, except for color differences. The inner melodicas of the P-37E and the P-37E are interchangeable. The cover of the reed chamber is the same, the reed chamber is the same, the reeds are the same; the mechanisms, the springs, the key pads are the same. All these parts are interchangeable between the two models. Your old P-37D will serve as an almost perfect parts backup for your new P-37E.