Need help with a hallmark

[coinhound1983]

Got a tennis bracelet for a good deal today however is has a hallmark I cannot distinguish it says 10k then under it. It has either HN or W or N I just cannot figure it out . Here's some magnified pics .

 

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[doublet2a]

Don't know about the makers mark, but that is one hell of a bracelet!!!

Tim

 

[coinhound1983]

Thank you. I know it weights 10g exactly 8in long and has 231baggetes. And 10k. I just can't pin point what the heck the hallmark is. It's killing me