Just picked this up for $50 bucks after haggling a bit, any idea what fit frame it is? Appears to be 21″ with a 9″ standover serial is all scraped up

Just picked this up for $50 bucks after haggling a bit, any idea what fit frame it is? Appears to be 21″ with a 9″ standover serial is all scraped up

by Ok_Meringue5371