Gwalior 1 Paisa KM#143 mirror-inverted

Hello,
While classifying my IPS coins, I came across this pair where the obverse of the left coin is mirror-reversed, lettering on top and date on bottom.
Is this a known variety?
In my old KM, I don't find any mention about this and nothing while googling.
Here are the pictures.
Thanks



Left coin: 5.86gr
Right coin: 6.11gr

An error coin with retrograde legends and date. Good catch!

Nice!

Thank you for your comments.
Do these errors command a premium to the standard quote?

Цитата: "maudry"​Thank you for your comments.
​Do these errors command a premium to the standard quote?

​It's not defined. But yes i would think this coin will be worth more than the regular strike. How much more is a question which can be best answered if you put the coin for sell in an auction.