Siam Silver

Recently came across these pieces, any idea what they are? are they silver?

 

Might want to add the photos.......

 

tried to past some photos, will try again.

 

have posted some photographs...any idea?

 

My wife is Thai. & she has told me they are not Siam

 

If you have them in your possession, you can always go down to your local bullion dealer and get them tested