Images:

gw2-the-briny-deep-hammer-1gw2-the-briny-deep-hammer-21gw2-the-briny-deep-hammer1

Set:

Slot Item Name Trading Post Preview Code
Hammer http://db.dulfy.net/item/27647 GW2 TP [&AgH/awAA]

Where to Obtain:

Mystic Forge: Random drop by combining 4 Level 75+ rare/exotic hammers