ANother question. My engine is missing the rear trailing wheels (i.e. it is a 2-4-0 wheel arrangement). Doesn’t look like it ever had a rear truck. Someone else mentioned that some 1666s did not come with one - comments?
Mine has a two-wheeled trailing truck.
I’ve seen them with and without. As far as Louis Marx was concerned, anything and everything went when it came time to hitting the price point a retailer wanted. They’d have shipped a loco with three drivers if it would have still run.
If it looks like it never had a trailing truck, it probably never did. If a truck had ever been there, it would have left some kind of mark, even minor.