EntityQ808267· pop 11· linked from 17 articlesBarker leverSign in to savepneumatic device for decreasing the resistance of the keys of the organ keyboards.Wikidata factsInstance ofmachineShow 2 more factsP1056workP61Charles Spackmann Barkervia Wikidata · CC0ConnectionsAristide Cavaillé-CollEntityFranceCountryCategoriesOrgans (music)