There have been a few 56 OT's in high grade over the last 2 decades - Pywell-Phillips SCA 2018 (ex somewhere else but I've forgotten where), Baldwins 47 (Gregory II) - later sold London Coins, fantastic coin, nearly full lustre, Mark Rasmussen list 15 ( Old British Collection) - ditto almost BU, Dave Craddock also had a nice one in his tray several years ago.