Ancient Coin Identification Help

Hello CC, I realize this may be a shot in the dark, but I'm hoping maybe someone out there will recognize and be able to identify something on it. So.... thank you in advance. I picked this up 30 years ago at an estate sale. It was listed as a "Roman coin," dated 200 -800 AD. I think it may be older, but just based on the wear and the off-center strike.
On the obverse, the head seems smaller and rounder than other Roman portraits. I think I see an "E" at the 10 pm position and a "C" to the left of it. Sorry, I tried different angles and lighting.
On the reverse, I can see what I think is either an "A" or a "W". The reverse is completely flat.
It's bronze or copper and weighs 2.97 grams