A closer look shows a clear eye, surrounded by black waves. Typically, a symbol like this represents the Eye of Providence, which is often used in religions to depict the all-seeing, all-knowing eye of God. The Egyptians were one of the earliest users of the symbol, which represented the Eye of Horus.
We don’t know about you, but in the Pretty Little Liars universe, an all-seeing entity immediately reminds us of the NAT club. The club’s name, Nos Animadvertus Totus, translates in Latin to “We see all.” The club, as we know, got together to secretly tape girls in Rosewood when they thought no one was looking, and they may be very close to both “A” and Alison’s (Sasha Pieterse) murderer.
Do you think the traveling party where Holden and Maya (Bianca Lawson) went is one of the NAT club’s events? An alternative theory is that the wrist stamp is part of a fraternity’s insignia (the Eye of Providence is often used by frats and sororities). That could mean that these parties are actually thrown by a Hollis College fraternity — which Noel Kahn’s (Brant Daugherty)’s brother could definitely belong to.