I'm pretty sure this was a plain colonial Dutch button before it became the more embellished and mysterious item it became next.
A small metal pin has been attached through one of the button holes. It can move like the hand of a clock, but I have no idea what its function was. This came to me as part of a collection of odd lots.
Only one available
I've always loved the way cultures adapt, and adopt, alien items that come their way. Angela Fisher's Africa Adorned is full of African examples
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