Antique gold filled watch chain help.

Hi there!
I recently purchased this antique gold filled pocket watch chain. I typically only purchase solid gold antique Victorian jewelry but I couldn’t help but buy this chain for its unique look. I’m completely uneducated when it comes to gold filled jewelry and don’t know much. There are no markings and I can’t figure out if the black areas are where the gold filled has rubbed off or not. Any advice or tips would be so appreciated! I’m not sure if I made a bad purchase or not at this point haha.

 

it's a unique looking chain....no wonder you were drawn to it ..

 

That's very unusual.

 

I'm seeing verdigris in the second photo which might suggest simply gold plated copper or brass. Others may have better ideas.

 

Thank you! I actually cleaned it pretty good and got all the black and green stuff off it and it looks totally different!