No mark on bottom ridge

Small marks between stud 1 and 3, and between 2 and 4

No mark near center on bottom ridge

Mark in bottom left corner

a

Marks above slot on right edge

a

No marks above slot on right edge

a

Mark between stud 2 and 6

c

Without line on right side of brick near bottom

Large mark next to "L"

b

Mark on top of stud recess 5

a

a

No clear edge at start of curve on long side.

a

No clear edge at start of curve on long side.

a

No clear edge at start of curve on long side.

a

No clear edge at start of curve on long side.

Pip 6mm wide

a

Pip 8mm wide

c

1mm recess on edges around center. No dot-pattern inside center ring. 7mm pip.

2mm recess on edges around center. Dot-pattern inside center ring. 7mm pip.

a

2mm recess on edges around center. Dot-pattern inside center ring. 6mm pip.

b

Pip diameter 5mm

a

Dots inside circle around pip

Stud 4 without scratches

Dots inside circle around pip

a

Stud 4 with scratches

Smooth surface inside circle around pip

b

Stud 4 with scratches