2008 version

graphic symbol on the coupon for machine processing

• numbering – vertically on the left side, horizontally in the right bottom part; the series is marked by a capital letter of the alphabet and a two-digit number; the serial number has six digits; vertically the figures are of a single size; horizontally they increase in size from left to right
• printing techniques: numbering – letterpress printing, other – offset printing

1996 version (specimen)

graphic symbol on the coupon for machine processing

• numbering – vertically on the left side, horizontally in the right bottom part; the series is marked by a capital letter of the alphabet and a two-digit number; the serial number has six digits; vertically the figures are of a single size; horizontally they increase in size from left to right
• printing techniques: numbering – letterpress printing, other – offset printing

1993 version

• the same; for differences in protective elements, see further