Suggested Tools and Materials for Harmonium Care
you might need both flat and cross-tip. A small flat screwdriver.
The flat screwdriver, and sometimes the cross-tip, is used for disassembling the harmonium. These tools are essential for any repairs that involve disassembly of the harmonium. The small screwdriver is used for removing reeds.
(or two if you have them), something like this: https://thd.co/329pNO3 (https://thd.co/329pNO3)
Used for tuning and various tasks including working on buzzing reeds....