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.
Anvil / Blind River Feb 18, 2018 Brighton, England, United Kingdom Uploaded by Smythster
Anvil Nov 5, 2016 Fosser, Norway Uploaded by Jarle Lindeland
Dirkschneider / Anvil / Dying Gorgeous Lies Apr 22, 2016 Heidelberg, Baden-Württemberg, Germany Uploaded by Murmlermicha