What country or commemorative coin does the devil play with between his fingers in the movie Detective Hell? It's better to talk about where to buy it.

This is the Byzantine silver dollar you mentioned, of course it's fake. See the picture comparison for details. This silver coin was issued when Constantine Xi, the last emperor of Byzantine Empire, was alive. Constantine Xi died in the siege of Constantinople by Sultan Muhammad Ⅱ.

In the film, it appears as a devil's trophy (this hobby is very common in westerners, and most of the accessories and appliances carried with it are enemy property or even a part of the body), and its significance is a metaphor for the opposing roles in the Crusade. That is, the devil is the extended meaning of Islam.

This metaphor should be allowed, because religion is different from politics, and movies are based on historical legends, so ...

This matter is talked about because of the old name of Constantinople, namely "New Rome" or "Second Rome". We used to say that "all roads lead to Rome" refers to this new Rome.

Another angle of using this silver coin is that this silver coin has eight protrusions on the outside of Constantine Xi's head, suggesting eight mans stars. This is called "absolute chaos" in western traditional history, which can indirectly verify the devil's belief and mentality.

As for the three circles on the back, they are very similar to some magic circles in the old western alchemy (see Baidu Encyclopedia). The magic circle has also been compared to the product of the devil, and many people were burned to death by the Vatican. If you have seen some related movies or anime works abroad, I don't think there will be too many questions.

I guess it's the Bible. You may have seen something similar to black.

The exposed part of the film

The original Byzantine silver coins.