THERE APPEARS TO BE THE CROSS HATCH PATTERN IN YOUR PICTURE #4 WHICH WOULD INDICATE IT IS ELEPHANT IVORY CAN'T TELL FOR SURE FROM A PICTURE. A EXPERT CAN TELL IF IT IS ASIAN OR AFRICAN BUT THE AGE CRACKS AND PATINA OFTEN MAKE IT MORE DIFICULT. THERE ARE A COUPLE OF POSTS IN THE OLD ARCHIVES ON HOW TO IDENTIFY DIFFERENT IVORYS AND SOME BOOK REFRENCES AS WELL. NICE KRIS