Tracks

I was going through the storeage room where I found a couple of tracks I had taken from a scrapyard years ago.
I got no gear or such, but it shouldnt be too hard to make.

http://img194.imageshack.us/img194/918/dsc4611g.jpg

Highest bidder or first, buyer pays the p&p.

what is the pitch of the tracks?

24mm on the longside it seems
33 on the width

Note, these are made out of plastic.