On further examination, I suspect there are two more screws hidden under the reed blocks. Should I try to proceed further, or am I getting out of my depth?
If you can't figure it out take it to a reputable melodian repair person near you. If it is just a repair that person should be able to do it without changing the nature of the box. Russ
Thanks to all for your help and advice. It's great to know John Roger is back among us, and, re. the post about favorite less well known brands, you'll have to go a long way to beat one of John's 'Cajun' brand boxes.