Netherlands 25.4.1968 P-91a PMG Superb Gem UNC 67 EPQ 10 Gulden
"Bullseye" variety, the first variety of this long-running type which wasn't replaced until 1997. So-called because of an additional circle on the back in the bullseye device (meant to aid printing) at top left. Considerably scarcer than the regular variety (see next lot for a high grade example of the more common variety).