From the Glamors and Gear preview regarding Gerolt's Masterworks;
Rowena, the maven of munitions at Revenant's Toll, espouses that proof of an item's authenticity can be found in Gerolt's signature─the mark of Rhalgr, breaker of worlds─and indeed, the master's fervor for the god of destruction in his early years is widely known. Those who would possess true power would do well to seek those artifacts that bear this mark.
Wouldn't be surprised to find this mark hidden on other soldiery gear sets.