What are these "rail-style" LEGO pieces?

Question

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.

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 02 '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 03 '20 at 11:57

score 6 · Accepted Answer · answered Sep 27 '20 at 17:06

6

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

answered Sep 27 '20 at 17:06

Syberion

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

What are these "rail-style" LEGO pieces?

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