ID Help: Chinese 4 Coin Proof Set: 1987?

This set was described as 1987...and has 4 10 Yuan Historical Figures...however, i can only find these sets in 5 Yuan for that date. Any help appreciated.

 

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Do they have a common reverse? Can you show clearer photos? Thanks.

 

Not in hand, so this is all I have.

 

I'm curious because, if assuming these are not legal tender, then why do they have the 10-Yuan denomination? Sometimes private mints issue commemorative sets for sale and then assign a denomination to them to give them an appearance of legitimacy. In your case, I don't know. Sorry.

 

Turns out the auction house made an error, it's 1997.

 

Found it..............Romance of the three kingdoms........v expensive set 10,000 mintage.

 

Good news indeed. You're lucky to have them.

 

Not in hand yet and very slow unresponsive auction house so not getting too excited until they all arrive.