(It's engraved with the tribal pattern of the Hoarfrost Mau.)
(You should take it to Tribunus [%dic:STR_DIC_N_DF3_Helgi_G].)
The Mau and the Elyos are both hot to grab this sentry post.
I'll take them. And give you something better.
[%dic:STR_DIC_I_quest_26909a] shows you've worked in Asmodae's interests against the nearby Mau and Elyos combatants.
Talk with [%dic:STR_DIC_N_DF3_Helgi_G].
Exchange the coins you obtained from dead Elyos and Mau.
You brought the coins you collected off the Hoarfrost Mau and Elyos enemies to Helgi, who changed them for a mark of distinguished service.