1868 Heaton Mint version Hong Kong 20 cents (H mark under Queen Victoria's portrait) 1 1

[econtse]

do anyone happen to know if Heaton Mint ever produced 1868 20 cents coin for Hong Kong? 

I came across a coin dealer in SE Asia selling a 1868 Hong Kong 20 cents coin with a "H" mark under Queen Victoria's portrait.

There's no where I can't find such version of mintage across all coin catalog and auction references.  

Edited March 25 by econtse
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[Greenstang]

Welcome to the forum

That is clearly a counterfeit, just compare with a photo of a genuine coin.   
How much is the seller asking? That is about a $300.00 coin if genuine.

[econtse]

@Greenstang thanks for your valuable comment. Yes, I compared it with several PCGS and Numista record, the letter "O" is obviously differed from all the genuine one. And the seller is just asking for around US$80 which is far cheap for such good condition.