3001oldf1 – 343 to 358 Inside Tubes

Logo: Modern logo.
Material: Polycarbonate (ABS is not transparent)
Inner ribs: yes. Visible as a frosted line on both the short and the long side.
Inner tubes: with flat bottom
Flowrib / center line inside top surface: Yes.
Mold pip: on the short side.
Mold numbers: These bricks were made in two molds: 343 to 351 and 352 to 358.

There are no other markings. I think every mold position received an unique number, so all these bricks might originate in the same mold.

The numbers 343, 344 and 345 can be found in the regular and a later, smaller font version.

Intellectual property protection: None.
Design ID (3001): None
Colors known: Transparent


  • Was this mold also used for non-transparent bricks?
  • If this were position numbers, what did the mold look like?

I found a different version of the 345 brick. Everything seems to be identical except the engraving of the number. The brick on the bottom was found in the UK, but in this case I don’t think that means much.

[Original post and comments on Flickr: 1, 2.]

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