5 for sure are brass and 1 is not. One bangle inside stamped 1937 see pic. I believe these are from the 50s to 70s era.
Vintage Lot Of 3 GM Stainless Steel Different Style Chain Bracelets Rock Biker
The lobster closure ensures a secure fit, while the retro and biker styles add a touch of edginess to any outfit. Perfect for gothic, punk, or fashion-forward individuals looking to add a unique flair to their jewelry collection.