I'm no expert of course, but I spent some time on a web
search and came up with some similar figures and fragments.
I think they may be Pre-Columbian figures from the
west Mexican shaft tomb cultural tradition, ca. 300 BC to 300 AD. The 600 year period the tradition covered gives lots of scope for variation in
style over time but the
themes are consistent.
Good luck with finding out more about them, they sure are an interesting
collection.
Best Regards,
Steve