All About Postage Stamp Trains
4163 is a phantom product. It appears on the back page of the bus set instruction booklet, but not in any of the catalogs, and I've never seen one, so it's a good bet it was never released.
Faller later renumbered the kit as 232263.
Precision Miniatures Rebrand
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Postage Stamp Trains is a Trademark of the Aurora Plastics Corporation.