I'll cut right to the chase. In OoT, there were symbols representing each race. Deku Shields have the Kokiri Emerald symbol, Gorons have the Goron's Ruby tattooed on them, an emblem like the Zora's Sapphire is in King Zora's throne room, the Shiekah carved the Lens of Truth into rubbery stones, the Gerudo signs and flags are adorned with the moon and star from the Mirror Shield, and the Hylians.. well, they put the Triforce onto anything within reach.
However, after OoT's release, the Gerudo symbol was changed to sort of a face, or mask. Possibly a wrench in secure storage. Whatever it is, it appeared in a few places in the Pirate's Fortress in MM, and on Twinrova's servants Onox and Veran in the Oracle games. My question is, what could this be based on? Is it a reference to something from A Link to the Past that I'm forgetting? Does anyone have any ideas?
(..and no, it doesn't really look like the entrance to the dungeon in the Desert of Mystery.)