I recently bought this set at an estate sale and am trying to determine its origin. ChatGPT suggests it’s from WMF, but I don’t see those exact marks from them or any other producers I’ve researched. The design is Dutch-inspired. Any ideas? Each piece has the same two marks - one a double triangle with a letter(?) and a symbol in it, and the other seems to be a lion, I’m thinking.
No results. 
Samuel Boyce Landeck style…
https://www.925-1000.com/forum/viewtopic.php?p=71183&hilit=m+inside+triangle#p71183
“Trident”. 