Help Identifying and Evaluating Ancient Roman Coin

Hello everyone,

I would like your help to identify and evaluate this Roman coin. I have attached clear pictures of both sides of the coin.

I would appreciate any information about the emperor, the period, the origin, and an approximate market value.

Thank you for your expertise and support!

Hello,

You may want to try the search by image: 

My best guess is N#301929, but I'm unsure about the mintmark.
You may want to check the other search results too.

What is the size and weight of the coin?

 

Hey Xavier, you already got the answer in your image search:

N#306671 

The year line on his coin is the one written "A" in field; "XXI•" in exergue (one of the last ones).

Thanks you Giobruno. I'm trying to learn a bit about Roman coins.