This appears to be a Queen Victoria India Mutiny Medal 1857 -1858.
Should this be sent for authentication and encasement?
why? Do you need it to be graded for some reason?
It's quite well-worn and knocked about on the rims. I'm not sure slabbing would add value - assuming all those rim dints don't prevent a straight grade.
It is what it is. Don't waste money having it slabbed.
Thank you for the comments and advice.