sure looks like one,cant make out the marking on the inside,can you?wide bands arent that rare,I have several this year.marked or not I would say yes its a ring !!!
..good job
After looking at this and researching a little. I think the mark inside the ring is a U with an arrow thru it and "5" to the right of it. A company named Uncas Manufacturing uses this mark. That is all I have found though and have not found any ring that looks like it.