The correct answer is 16 players have represented their country whilst being O's players.
Thank you to all the entrants but there can only be one winner. Keep accessing the site and I hope to be reviewing another Neilson Kaufman book in the near future - this time a biography of O's and Donny Rovers legend, Peter Kitchen, "Kitchen Gourmet- The Peter Kitchen Story," a limited edition published by Derwent Press.
Thanks
Martin