Old ribbon connectors

[Weehorror]

Can anyone advise please.

I regularly find these older ribbon connectors in old pcs. Normally the tips of the pins have a tiny dot of gold, but these are fully plated. However, I’m not convinced this is gold as the metal has a slight greenish tint to it. Advice please.

 

[Yggdrasil]

Can anyone advise please.

I regularly find these older ribbon connectors in old pcs. Normally the tips of the pins have a tiny dot of gold, but these are fully plated. However, I’m not convinced this is gold as the metal has a slight greenish tint to it. Advice please.View attachment 64890

Test it to see, snip off a tiny piece and put it in HCl.
If all disappears it is brass.
Is it from a good brand of boards?

 

[Weehorror]

Test it to see, snip off a tiny piece and put it in HCl.
If all disappears it is brass.
Is it from a good brand of boards?

Not sure about the quality of the boards as I have stripped so many and stockpiled the connectors. I will try the HCL when I get a chance. In the meantime I have segregated all I find just in case there was a contamination issue later.
Thanks for the advice.

 

[Yggdrasil]

Not sure about the quality of the boards as I have stripped so many and stockpiled the connectors. I will try the HCL when I get a chance. In the meantime I have segregated all I find just in case there was a contamination issue later.
Thanks for the advice.

I have seen fully plated connectors like this only on higher end boards.

 

[Weehorror]

I have seen fully plated connectors like this only on higher end boards.

I’ve seen quite a diversity in the gold content of connectors, but what puzzles me is the green tint. What could that be?