Hey, a barn find is a barn find! Looks like you scored what looks to be a late 60's early 70's Huffy built mini girl's bike. There oughta be a ser# under the bottom bracket (cranks), on the side of the head tube or on the left rear drop out. The first number of the ser# will indicate the last number of the year it was made (i.e. H4567887 would be the "4", making it in this case a 74', for example) Or just post up the number and i'll check it out for ya. Cool little find.