One of those links above I went to and typed the characters in, and it shows 1972 as well ...
but as the second image shows there are many characters that look alike.
Here is a 5 Paisa 2026 and your 10 Paisa 2029 coins, to compare what characters the mint used ...

so looks like in 2026 the mint used the last character to have a squiggly end, and in 2029 the last character had a long straight end. I guess.