No excess plastic on bottom edge top left-side.

No rounded stud recesses

No marks in stud recess 1

a

Thin line extending left from "L"

No marks on bottom of stud recess 1 and 2

No marks inside stud recess 4

Bottom stud recess normal

Several lines extending left from "L"

a

Bottom stud recess has excess plastic

a

Rounded stud recess 4

a

Excess plastic on left side of stud recess 1

b

Rounded stud recess 1

Rounded stud recess 1

a

No marks on left side of brick

With circle in stud-recess 12

4 rib spots on upper/lower walls

a

Slope inside both stud recesses

Marks inside both stud recesses.

a

Small mark inside top stud recess.

a

Marks inside bottom stud recess.

No mark between stud 2 and 6.

No mark inside stud recess 7.

Mark inside stud recess 7.

a

Line in stud recess 1 20 deg. - no mark in stud recess 7.

c

Line in stud recess 1 10 deg. - mark in stud recess 7.

d

Line in stud recess 1 0 deg. (nearly horizontal) - no mark in stud recess 7.

e

No mark in stud recess 6 - mark in stud recess 8.

a

Mark in stud recess 6 and 8.

b

No marks inside stud recess 5.

Marks inside stud recess 5.

a

Mark in stud recess 4.

a

Larger marks inside stud recess 1 and 3.

a

Pip 6mm wide

a

Pip 6mm wide

1mm recess on edge near center.

Almost no recess on edge near center.

a

High cross support

a

High cross support

a

Low cross support

Low cross support

High cross support

a

Line inside stud 5

a

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

b

a

Excess plastic on bottom edge top left-side.

Different texture

a

Different stud pattern (i think)