Forensic dating of silver

[Sengoku]

I found what appears to be crudely refined silver. I've gotten two conflicting reports on the % of silver in it. That really doesn't bother me. What I really want to know is the date approx of its smelting. Is it possible to date metal? Unfortunately I pretty much toothbrush scrubbed the patina off of the piece. Any help would be greatly appreciated. Thanks!

 

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[nsdq]

Ask her out , take her to dinner , a movie , walker her to the door................ need pics buddy

 

[Sengoku]

Ask her out , take her to dinner , a movie , walker her to the door................ need pics buddy

If you can date it by pictures, great! It's about and inch long, half inch wide, half an ounce .
Is there an analysis that anybody knows of that can date non-ferrous metals.?
One source says it's from the Asian continent, so it could mean very old, before JAPAN had mining and smelting tech, or it could have been a trade good from the last few hundred years.

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Thanks for looking

 

[nsdq]

.......................Still waiting on pics