Hi Paul --
The 2020 Red Book says $200 in AU-50. Slabbing would take a big chunk out of that. Scanning the "sold" coins on eBay, a typical retail price is about $150 slabbed or unslabbed, which is $50 less than Red Book catalog value. Everything is normal so far. Based on that, I'd say no slab.
Your coin looks cleaned to me. There is clearly wear on the high points, but the high points are the same color as the rest of the coin. Internet photos can easily fool me, but if it is cleaned, it is worth less than $150.
It also seems to have a slightly off center strike, maybe 3% off center. This does not add value.