Yes, kind of a fake washer under the head, the ones you picture are pretty much the same, other than those little lines I mentioned, and those look like chrome.
I'm anal, but if you have the choice and the cost isn't crazy, I'd go with stainless. Not sure about chrome, but the steel underneath the chrome will react with the aluminum, eventually ruining the trim. Pretty big variable how long or how bad, but eventually it will happen (if the chrome is compromised I assume) and the aluminum is in contact with the base metal.
Much (almost all?) aftermarket chrome is garbage, because it's apparently done cheaply, or completely wrong.
No one here can hook you up with some?