Cypraea Aurantium with white line across?

[cuticula]

heya,

I bought this shell on a market in Kunming, Yunnan, South China. I'm sure it's a cypraea aurantium, but i never saw anything like this one, with the white line across.
Could anyone tell me if it's a fake or not.
And if it's real, is this a pricy shell? There's no way i'm selling it, but i'm just currious about a possible (crazy) price <img src="images/smiley/smile.gif" alt="" border="0" />.

Tnx!    

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