There is more than one artist using the name Anvil:
These are photos from concerts where Anvil played, so they may be of other bands that played the concert as well.
Black Sabbath Garden Party / Anvil / Mama's Boys / Twisted Sister / MOTORHEAD Aug 28, 1983 Dublin, Leinster, Ireland Uploaded by Rockerman75
Steve Harley & Cockney Rebel
Reading Rock Festival 1983 Aug 26 - 28, 1983 Reading, England, United Kingdom Uploaded by Craig Hatfield
23rd National Rock Festival Aug 26 - 28, 1983 Reading, England, United Kingdom Uploaded by Jim Jones
Pic by Michael Knowles from 'Marillion Collectors Worldwide' Facebook group.
Bottles & cans flying
Site layout from programme