Silver necklace and bracelet - what marks are these

Hello all,
I was wondering if anyone could tell me something about this necklace and matching bracelet. They were a gift from a German friend of the family, so they're likely German, but not necessarily.
They have what appears to be identical sets of marks. The middle one appears to be a G but I am unable to make out what the last one says.
Many thanks!

 

Günthner, Bijou Jeunesse


https://annodazumal-antikschmuck.de/1960s-Modernism-Necklace-in-Silver-with-a-Black-Opal?
"There is little information in the history of the Günthner jewellery manufactory in Pforzheim. In the 1960/70s, the Bijou Jeunesse jewellery series was made there."

 

Interesting that their necklaces all have lobster claw clasps.

Debora

 

Not all ... (or is this a replacement?)

but it does seem to be the case with all the necklaces of the type that ebbakah posted

 

In Europe this model lobster clasp was already used in the 1960s.

 

Check out 4:10, under 'Italian gold clasp':

 

Too interesting. I didn't know that.

Debora

 

Thank you so much for the information! Really can't thank you enough.

 

You just did

 

I don't think that box chain came with the pendant.