2x20l indigo blue (pos.4+80) both with Grooms "2" No.5 (pos.80 notmentioned in Koundouros study), 20l prussian blue (pos.57) Grooms "0" No.27 and 20l blue (pos.15) Grooms "0" No.18, used. All stampsvery fine. Very fine lot for the determination ofthe settings. (Hellas 51b+51d+51e).