Featured Anyone recognize this MARK on Modernist TRI-COLOR AMBER & STERLING Brooch?

Hello, again!
I just picked up a few pieces of amber jewelry from a local auction, and this is one of the pieces I like the best. It isn't as unique/rare as I thought it might be, as I found a couple more just like it on eBay. They look to have the same mark, but neither one identified it.
I would really like to ID the maker, if possible. Besides the "925" stamp, there is another mark (oriented upside-down from the silver mark) that looks like a "K inside G".
In my research, I have come across other pieces of similar style, but a completely different mark, "V-8", identified as "Poland Valerio" - but that mark is very clear and looks nothing like this one. Might there be any relationship between them, designer or origin?
As always, any knowledge or opinions shared here are appreciated.

 

No idea, but if I'd found that it would be in my jewelry stash.

 

Same mark here, but no info ...
https://www.rubylane.com/item/653379-KGM8886/Sterling-Silver-Amber-Pin-Four-Shades

 

nice brooch...

 

Georg Kramer, according to https://www.ebay.com/itm/355060049846
But other Georg Kramer pieces I found so far, have a different GK mark:

 

Same mark here:
https://www.ebay.com/itm/Abstract-P...inish-14-K-Gold-Diamonds-/274284208523?_ul=IN
No info on maker, but it's German

 

Yes, I think that is just wishful thinking on someone's part.

 

Well, that is something concrete, at least! And they make gold jewelry, as well as silver.

 

I saw the Kramer association as I searched, but did not see the use of 925 with the Kramer mark.

 

It's this one no ? Gayer and Krauss

https://www.ebay.com/itm/224470504316

 

The Gayer & Krauss marks (on other pieces) are these

 

Too right! And mine. Great design