Polly's old head is a piece of headwear in Fallout 76.
Characteristics
Polly's old head looks identical to the Assaultron helmet, but has been painted on the back to say "Polly Built To Kill" (stylized as "POLLY BuiLT TO KILL") on top of a red heart.
Location
Polly's old head is given to the Vault Dweller by Polly in the Wayward.