1Anna Nizam Mir Osman Ali Khan Copper Issue Unique and Rare

he 1 Anna coin of Nizam Mir Osman Ali Khan (reigned 1911–1948) is a notable piece of Hyderabadi numismatic history, characterized by its shifting metal compositions and unique square-with-rounded-corners shape. While standard copper-nickel and bronze issues are relatively common, certain specific issues are considered rare or scarce. 

Coin Specifications and Rarity

The 1 Anna coin was typically minted in three main varieties during this period: 

• Copper-Nickel (Round, 1920–1935): Identified as KM# Y48, this 3.6g round coin is often described as scarce or about extremely fine in numismatic circles.
• Copper-Nickel (Square, 1937–1942): Identified as KM# Y49, this issue weighs 3.7g and transitioned the denomination to its iconic square shape.
• Bronze/Copper (Square, 1942–1949): Identified as KM# Y59, this variety was minted in bronze due to a metal shortage during World War II.