I came across a few pieces that are stamped Maniquis Sterling. I haven’t found much on it, but the few things I did find said that is was Navajo; however, no one has been able to confirm or deny whether it is actually Navajo or not. Here are a few of the pieces:
Also, here are 2 other pieces I have come across, they aren’t labeled as anything, but they’re awesome. So I thought I would share.