Many thanks to Jo Brodie for letting us add her photos of another yin yang mark.
This one has a double ring surround and the other ones don't have this.
Don't know who this mark belongs to yet, but putting it here for now.
I'm trying to get hold of Julian, but it is not proving to be easy.
![Julian Pirie yin yang mark Ying_y10](https://i.servimg.com/u/f49/12/53/23/96/ying_y10.jpg)
![Julian Pirie yin yang mark Ying_y11](https://i.servimg.com/u/f49/12/53/23/96/ying_y11.jpg)
![Julian Pirie yin yang mark Ying_y12](https://i.servimg.com/u/f49/12/53/23/96/ying_y12.jpg)
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» Can you help with identifying this Potters Mark please?