Unknown, Suspect China

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Unfortunately, this is not a genuine coin. It is one of thousands of types of fantasy and replica "dollars" that have been produced privately in China for decades now.

The design is loosely based on a very scarce pattern coin, the "double dragon tael". Example on Coinquest. These coins were never actually issued for circulation and the couple of known genuine examples are all in uncirculated condition.

However, you may notice that the Chinese inscriptions on the non-dragon side of your coin are different. That's because the design has been modified by whoever made it.

A "tael" is a Chinese unit of weight, about 32 grams. The Chinese imperial government was considering striking coins to the tael standard, but in the end decided to use the dollar standard instead of the tael. A dollar weighs 0.72 tael, or to use the formal names of the subdivisions, "7 mace and 2 candareens". Genuine Chinese dollars say "7 mace 2 candareens" on them, usually in both Chinese and English.

Your coin does not say either "one tael" or "7 mace 2 candareens". It says "7 mace 2", with the "candareen" character missing. Genuine taels have five characters in the lower legend; your coin also has five characters there, but the usual dollar inscription has six characters. That's why the final "candareens" character is missing. The "double dragon" design was not used to produce pattern coins to the dollar standard.

Your coin has no "melt value", since there is virtually zero chance that the counterfeiters would have made it of silver. These Chinese fantasy dollars are usually made of a nickel-brass alloy that can look very silvery, but contains no silver.

Thanxz to all for a terrific education, I will probably never get a chance to implement all that knowledge but I am throughly convinced you'all know the subject completely!