Bar Cents by Variety | Colonial Coins by Type 

Obverse of Bar Cent Struck over an India 1/2 Anna     Reverse of Bar Cent Struck over an India 1/2 Anna

Struck over an India (Bangal Presidency - Prinsep Coinage 1/2 Anna

PCGS No: Not listed

Rarity: Unique?

30-32 millimeters (irregular)

Metal content:
Copper - 100%

Weight: 197.5 grains (12.8 grams)

Edge: Plain

Mintmark: None

Images courtesy of Ron Guth

This piece was struck over an AH1195 (1780) Copper 1/2 Anna from India (a Prinsep coin issued during the Bengal Presidency).  A positive attribution is possible because enough details of the host coin remain visible.

The dies are nearly identical to those used to strike known Bar Cents.  Either this is a new, separate die variety or an exceptionally well-made counterfeit.

Sources and/or recommended reading:
"Walter Breen's Complete Encyclopedia Of U.S. And Colonial Coins" by Walter Breen