Is this a mint error?!

Hello!

Please, for the coin in the second picture, is this a mint error?!

If so, is it valuable?!

Thank you! 

No, those are different characters like you can see in the year line comments of the relevant catalog page.

N#3047 

One stands for ‘first’ the other for ‘five’.

P.S. please always try to crop your pictures (only about a third of those pictures is of interest), any smartphone has a simple rectangular cropping feature.