Wiktionary
gob iron
n. (context slang English) Term for a simple harmonica
Wikipedia
Gob Iron
''' Gob Iron '''is an American musical group officially formed in 2006. It consists of Uncle Tupelo/ Son Volt's Jay Farrar and Varnaline's Anders Parker. Their debut album, Death Songs For The Living was released on October 31, 2006 by Transmit Sound/ Legacy Recordings. Their name comes from a British slang term for a harmonica.