
Dogbone
From1954
To1954

Narrow Straight 'O' 1x8 with mold identifiers
From1958
To1970
Old logo - 3mm stud recess - corner-pip
From1958
To1959
Old logo - smaller stud recess - corner-pip - no mold-id
From1958
To1959

Tall wide straight 'O' - corner pip - smaller stud recess
From1958
To1959

Narrow Straight 'O' without mold identifiers
From1965
To1970