This one is a Mustang from Trelleborg. It has
a "Gel" saddle from Bianchi and the Shimano
5SP Positron shifter with a single chainring
front. Perhaps somewhat surprisingly it has
a kickstand and a rack. The tires are 32-630
or 27x1-1/4.

On the chainring it says
"Japan Threearrows 46T".

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underground experts united
http://user.it.uu.se/~embe8573