C.A. Seydel Söhne Key lens
C.A. Seydel Söhne Key lens, Key-lens, Lenticular transparent sticker to stick over existing key stickers, Set of 16 pieces, Permanent protection of the key stickers, Suitable for all harmonicas, Noticeably better - after a short period of getting used to it, the player notices immediately if he holds the instrument the wrong way round