Below is picture of 2 Mannborg's that I just repaired back into use. Left is 2 set of reeds model serial no: 62414 case made of plywood and covered with tolex or leatherette as mentioned in some occasions. On the right is 1 set of reeds model srno: 64288 case made of mahogany.
Both had broken folding mechanism and organ on right had broken base plate that I changed because too much missing pieces.
Bellows in both needed to be repaired having new cloth and valves . Both are now re-tuned from 440 to 442Hz.
Best Regards Jaakko