Japanese Coin [решено]

A while ago, I purchsed this coin in Tokyo, the seller did not speak englisch, and I cannot find this coin, dia 28,6mm, 6,24g Copper

Thanks for any advice

Numista search via image came up with this one 

10 Cash (Pattern) - Kansu Province – Numista

But that looks like brass not like copper at all.

Or was it gilded, can't really tell from the images.

its really Copper, colour changed from light of flash.

It is  realln Pn2 from Kansu province thanks for the help😉

It is brass, just not a pattern..

N#276307

RegularCoiner

It is brass, just not a pattern..

N#276307

Why does it have the same Pn2 reference?