Harmonium bellows spring, plate thickness 1.05 mm, 3 pounds. Carefully made by hand in POM's workshop in Pécs. Ensures even wind pressure in the harmonium bellows.
Harmonium bellows spring, plate thickness 1.15 mm, 6 pounds. Carefully made by hand in POM's workshop in Pécs. Ensures even wind pressure in the harmonium bellows.
Harmonium bellows spring, plate thickness 1.25 mm, 7.8 pounds. Carefully made by hand in POM's workshop in Pécs. Ensures even wind pressure in the harmonium bellows.
Harmonium bellows spring, plate thickness 1.35 mm, 9.1 pounds. Carefully made by hand in POM's workshop in Pécs. Ensures even wind pressure in the harmonium bellows.