Identical Sizes, Different Values: The Coin Recognition Problem
The new coin series was expected to include tactile features for easier recognition, but with overlapping sizes may still pose challenges for the visually impaired. However, when comparing the older ₹1 coin, the existing ₹2 coin, and the newly launched ₹5 coin, it becomes apparent that all three share the same 25 mm diameter and have nearly identical thickness, making physical distinction challenging. The last issuance of the 25 mm ₹1 coin dates back to 2004, while the ₹2 coin with the same diameter continued to be minted until 2019. With the introduction of the new coin series—particularly the new ₹5 coin—circulation now includes multiple denominations using the same size profile, creating an overlap and potential confusion for both the visually impaired and the general public. Although the government has indicated that the new series will eventually replace the older denominations, such transitions in India typically take several decades to fully phase out earlier series from circula...
