DelDiosPeruvians

We have a handicapped horsemanship program that takes in donated horse related items and then sells them in a little tack store. That is where I got this saddle. The fenders are butter soft leather. It has a stamp 150551 and a little square up above that with a number 7 in it. The round metal cinch holders are brass and one clearly has an anchor emblem on it. The saddle has a back cinch also. So, does anyone know what it is and approximately how old?