by the way, your Flying O is a beautiful bicycle. congrats.
Also, on the front part of the left dropout, before the axle, or under your washer is a MO** number, the asterisk being another letter, on the Flying O' that is where the year code is. Not enough room with the 20X6. the Otasco designation.
Where did you find this bike, in an abandoned Otasco Store? It looks new.