Au details harshly cleaned I can see the fine scratches from cleaning even on my scratched iPhone screen too bad is a nicely struck one almost proof like
That type of severe cleaning on a US coin usually screams Made in China. I don't know enough about the trade dollars, but, this cleaning looks like it was meant to eliminate surface imperfections on a possible copy. Some stars look different from others.
The provided photo shows a crisp date and stars on the lower half, while the top half appears blurry and without crisp detail. I do not think it would be poured because China has modern coin presses. Fake planchet surfaces vary in appearance, harsh cleaning makes them look less suspicious. Fake patina often comes from manure.
Since this is strictly an IMHO, I would grade it as VF30 at best. Way to much wear on the top half of the stars, Liberty's breast, gown and the detail in the eagles wings. Not to mention all the scratches that may or may not be from circulation. The weakness of the top of the obverse could be from an uneven strike but it does make one wonder if it was artificially induced.
Love these ones. Someone from the UK posted them elsewhere, asking for authenticity. Claims they were purchased at the War Museum in Vietnam, but the obverses and reverses don't match...