The Mask of Loki was created in 1990.
Loki - comics - was created in 1962.
Stanly Ipkis is the unfortunate soul who stumbles accross the mask. However the true owner is Loki =3
Loki's Minions Capture the Flag was created on 1998-11-12.
I haven't seen a reference to a mask in the myths. Loki is a trickster, a shapeshifter, which would make sense out of the mask. He made a weapon, which was used by Surt to burn the world. Lævateinn was its name, and it is believed to be a sword, wand, or staff. The nature of how the mask was obtained matches with Lævateinn, and thus the mask is most likely Lævateinn. But don't take my word for it, I may have missed it. Keep searching and share what you learn with others.
The Mask of Sheba was created in 1970.
The Mask of Orpheus was created in 1986.
Mask of Murder was created in 1985.
Tiger Mask was created in 1970.
Paper Mask was created in 1990.
The Etruscan Mask was created in 2007.
The Black Mask was created in 1901.
Mask of Agamemnon was created in 1876.