Resembling a circus or gypsy caravan more than a combat unit, the MechWarriors of the Seventeenth are permitted to decorate their BattleMechs as they see fit.
Per FM: Merc (revised), page 54
Tarantula, FM: Mercenaries Revised (plate 8)
Commando, CM: Mercenaries (p 110)
The regimental insignia consists of a howling coyote, sitting with its head silhouetted against a full moon. MechWarriors often display personal crests of other decorations. Per FM:Mercenaries Revised, page 54.