http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31419112optical instrument cases http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31419112 temporary alphabetical list: optical instruments BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31419112 optical instrument case UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31419112 case, optical instrument UF