I can't find this Native American silversmiths mark?

[tamrock]

I purchased this 3" by 1-3/4" Silver inland stone cross with some kind of diamond shape horn set on the reverse. I've been unable to identify the makers mark on it and it is the only stamped mark on it. It's not been marked with anything like sterling or .925, but it is pure silver. I've looked at what available pictorial marks I could online more then a few times and I haven't been able to find a match. Could be it's not offered online or I'm missing it? The mark looks like a round shield with two feathers to the left side. Hopefully one of you will recognize this mark?

 

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[SkaBa]

Can't help on mark, but really nice cross.

 

[digging440yrs]

I think the shield and feathers are just design, the makers mark is in pic #1 just left of the turquoise. Looks like a C with a bow thru it. This is the closest I can find------------Charlie Bird, Santo Domingo-----I'm not saying this is it----Tom