To lipsu or scasi :
i think i rmb seeing your works with this concho
is it from goro's?
i saw the same concho from goros's too
This is base on 1913 - 30 US 5 cents coin. Normally such conchos are use for bikers and native americans design, original real coin will cost is not being discuss so far, and normally such coins are rare to source.
Most of the current one used in the markets are reproduction, same like us, Redmoon RRC series, KC's Leather also uses these reproduction series.
Goros could have used the original, self made, doming the coin to form as conchos, he himself is a biker, and he spend several years living in the native american tribes so it make sense for him to use these conchos on his work.
Actually the reverse side of the conchos have more detailing, as these conchos are call buffalo coin.
http://en.wikipedia.org/wiki/Buffalo_nickel
we uses the buffalo side more then the Red Indian side