The restoration work to the bench includes re-painting the distinctive portraits of the four band members, and repairing any scratches or chips.
The film follows the iconic outfit's journey from the band's early beginnings in Birmingham to heavy metal infamy and their eventual break-up.
Partnering with Julien’s Auctions, all proceeds will benefit members of the music community who have been affected by the COVID-19 pandemic.
The guitar is a limited edition of Iommi's beloved 1964 Special SG.
The masters of British metal rock, they mutated from the blues to genre-defining sonic mayhem with key discs like their self-titled debut, Paranoid, Master Of Reality and the comeback classic 13.
The legendary frontman said it was "bittersweet" playing the band's final show in Birmingham without their original drummer.
The exhibition will run from 22 June until 29 September at the Birmingham Museum & Art Gallery.
The event will run across Friday 22 & Saturday 23 March At Rich Mix in London’s Bethnal Green Road.
The new bench will be placed on the renamed Black Sabbath Bridge on the city's Broad Street.
The exhibition features portraits from the Home Of Metal Black Sabbath fan archive and memorabilia sourced directly from the band members.
The rock music weekend takes place at The Exchange in North Shields, hosted by the Whitley Bay Film Festival and presented by music historian and author Chris Phipps.
Legendary Black Sabbath guitarist Tony Iommi is set to host a fundraising lunch for a cancer treatment unit at a Birmingham hospital
Megadeth frontman Dave Mustaine and Ozzy Osbourne guitarist Zakk Wylde have been confirmed to appear at the 2018 Rock And Roll Fantasy Camp
Legendary Black Sabbath guitarist Tony Iommi has opened a new music college, the British And Irish Modern Music Institute in Birmingham
The DVD release of Black Sabbath's concert film The End documents the band's final show in Birmingham, closing a monumental chapter in rock history