THE POST YOU LINKED PRETTY MUCH SAYS IT ALL. I HAVE NOT SEEN AS MANY SPEARS AS MANDAU AND THERE ARE A FEW OLD KERIS BLADES THAT HAVE BEEN MOUNTED IN COLORFUL DRESS AS IS TYPICAL FOR THESE. AS FAR AS I KNOW THESE ARE PURELY FOR SALE TO TOURISTS AND DO NOT EVEN HAVE ANY CEREMONIAL USE AND ARE NOT PRESENTED TO IMPORTANT PEOPLE.
THEY DO LOOK BARBARIC AND MAKE A INTERESTING WALL HANGER AND SOME MAY BE OLDER THAN 65 YEARS. SO HANG IT ON THE WALL AND ENJOY IT, MOST WHO SEE IT WILL NEVER KNOW THE DIFERENCE.