P_M6a= without block/serial # P_M6b= with
block/serial #
Varieties= block/serial # color and size varieties (red 3.0, black or
green 3.5, green or black 4.0 mm) on P_M6b
P_M6b
FRONT
P_M6b
BACK
Variety.
4 corners.
Normally the numbers are drawn with 2 lines + 1 line shading.
The numbers here are drawn with 1 line + 1 line shading.
Found on BA, OA series.
