Logo: Modern logo
Inner ribs: none
Inner tubes: with rounded bottom
Flowrib / center line inside top surface: Yes.
Mold pip: just above the center on the short side.
Mold numbers: V
Mold position numbers:
- 1 to to 11, 13 to 16 and 40 (replacing 12)
- Numbers 1 to 8 and 40 are on the left side.
- The 3 is inverted on both number 3 and 13.
Intellectual property protection: Pat. pend.
Colors known: Several non-production colors.
- odd materials and colors
- mold number 12 replaced by 40
- Like so many of the odd bricks… why were these made?
[Original post and comments on Flickr.]