Another Native American jewelry find needing info

[Digger]

I found this earlier this year at a construction site where we have pulled Seated's back to 1857 and lots of later 1800's coins. I believe it is called a Naja from a Navajo Squash Blossom necklace. My question is the age. I find no marks stamped on it and it tests to be silver. Any idea how I can tell the approximant age? They've been making these from the 1880's to the present. Attached is an example of one from the 1920's

 

[CaptEsteban]

It does not HAVE to be marked to be silver . Much of the older silver jewelry is not marked. I would estimate it to be approximately early 1900's as well. GREAT find

 

[yaxthri]

This is a very beautiful find, love turqois...

 

[sutphin]

SWEETTTTTTTTTTTTTTTTTTTTTTTT ..