The pictures posted aren't perfect, but in the hopes of helping others in the future searching the forums text based I will describe all 4 stamps on each piece.
1st -
Unusual circular stamp with the mark GZ intertwined and a dot on the right side of the stamp
2nd - A standing lion with tail risen facing right in an elongated hectagon shape. There is a key on each piece (indicating they were exported from my research) which varies slightly from piece to piece.
3rd - A profile of a woman with the letter A stamped on the back of her head (Amsterdam?)
4th - A circle with a C in it which matches the 1912 dutch code dating on your hallmark pages.
I am grateful for any information offered but would really love to know who crafted these pieces. I am not looking to sell these - I just would like to know where they come from.


I included a very sad paint file I made to show more clearly what the symbols look like - please forgive my terrible drawing "skills" :)

THANKS SO MUCH IN ADVANCE!!!!
.