WWI Military Soldier’s store Family Picture Photo Pin Backs Pins ~ Parents??

Wonderful and Extremely Rare Antique Family Photo Pin Backs. They are marked on the back PIN PATD May 3, 1898. They have a store diameter of about 5/8” and have a closed pin back. These were found in a WWI army soldier's belongings when he came home from the service. I think they were his parents. I have never seen these or anything like these....this size and condition. Very rare and special.