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I have acquired several large bags of LEGO - most are the tradition bricks, but what kit are these (see photo) rail-type pieces from? They are identified on the reverse with a letter, such as "E", and a 1 or 2-digit number. Some of the rails contain small teeth the entire length - some are smooth.

enter image description here

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    Related: What different types of train tracks exist
    – Uli
    Sep 27 '20 at 18:50
  • That gear doesn't look like Lego at all. But those rails where the normal rails in the 70's
    – Tonny
    Sep 29 '20 at 14:32
  • @Tonny , The gear is part # 743 :Technic, Gear Samsonite 35 Tooth
    – Syberion
    Oct 2 '20 at 21:51
  • @Syberion Interresting... The early Technic gears I'm familiar with are from the 70's. The red (small) , blue (medium) and yellow (big) ones with the white axles. Seems these are even bigger. I had never seen them before.
    – Tonny
    Oct 3 '20 at 11:57
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The rails with the "small teeth" are

Part No: 3230a , Train, Track Tapered Rail Curved Inside

Part No: 3229a Name: Train, Track Tapered Rail Curved Outside

Part No: 3228a Name: Train, Track Tapered Rail Straight 16L

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  • OK - Thanks Syberion.
    – Norm W.
    Sep 30 '20 at 15:24

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