Two Vintage Bracelets/ Black and 16KGold and Pearl and Gold (Tone?)

I am selling two lovely bracelets. I'm not sure how old they are but definitely not new. I believe they are from the 1960's but if not around that time. Looking at them carefully, I see that the catch on the black and gold bracelet is marked 685 which would indicate 16K gold. I don't know what the black balls are . The other bracelet may be pearl because it feels scratchy like pearl but I wish I could guarantee that. The gold is not marked. Item Length 6 1/2 and 7 inches