Similar Material it-1 “Instrument” Stringed Instrument Insight on the Scriptures, Volume 2 Stringed Instrument Aid to Bible Understanding Leveling Instrument Aid to Bible Understanding Leveling Instrument Insight on the Scriptures, Volume 2 Jehovah’s Change of Instrument The Watchtower Announcing Jehovah’s Kingdom—1963 Zither Aid to Bible Understanding Zither Insight on the Scriptures, Volume 2 Harp Insight on the Scriptures, Volume 1 Harp Aid to Bible Understanding ‘If Only I Could Play Like That!’ Awake!—1991