Some help needed 1221 - 1254 gold hyperpyron of John III Doukas Vatatzes

I was hoping to get a little more detailed information about this gold coin.
medoraman was a huge help to identify the coin and point me in the right direction.

This is what I came up with based on Chris's information.
composition: gold
weight:4.03 grams
size: approx 25-28mm

1221 - 1254 gold hyperpyron coin of John III Doukas Vatatzes

In all the examples I have found, none of them have this "Star" (see image). They either have a dot, multiple dots, or no dot.
Chris mentioned it could be a control symbol used by the mint.

Does anyone have insight or the ability to tell me anything more about this coin? More specifically the star?

Thank you for any information.
-greg

 

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The star in this case is what is known as a "siglon," an internal mint control symbol. Numismatists have not yet deciphered the specific purpose or arrangement of these symbols.

Here is a similar specimen with a star: http://www.cngcoins.com/Coin.aspx?CoinID=207310

 

Perfect, thank you!

 

When youre done send that bad boy my way G......gotta love ancient/ really really old gold. I sure do!

 

Lol you got it trey! bullion on it's way.

 

Wow awesome coin gbroke, i've wanted one for some time, well i just bought 2..i hope you don't mine, i'm posting this one...
Micheal Vll ...1071- 1078...AD..
Ob. Christ facing, holding 4 gosples..
AV Histamenon Nomisma..
Seyphate...
Mint..Constantinople
29mm x 4.36 g.

 

Nice ashtrays guys!

 

I don't mind at all. I've learned more about ancients today than I have ever knew. That's a beautiful coin.

Lol John. I will give this one to my neice to use as a little bowl for her doll house formal dining room.