That RV system is from 1976,it goes from 1-100. your example sells for 70-100 dug! The lower the RV # the more scarce/ valuable . The George Washington inaugurals are like 2-6 and common civil war union buttons can be RV 60 or higher , this system was made when all excavated buttons where dug by sifting old camps and forts, there are way more buttons now but there are way more collectors too!