Auction Seller Guide

My mom has asked me to list the large ww1 collection from what she inherited. my questions about it are, do I need to add the watermark to the photos

I originally thought these were African, but now wonder if they may be from PNG. Any thoughts. The first is a cane or staff, with a figure carved

Can anyone identify for me the type of prints these are? Am I correct in thinking that they are serigraphs? Some of the detailing is done in metallic

I ran across this pair of what I assume are salts in a local estate I bought earlier this year. Since then I’ve been trying, off and on, to find