I found a photo of this early D4, I am told it was made in 1950, I know some do not care for how small the boiler is for running on steam, however I have found small steam engines can be quite delightful running on aquarium pump.
Maybe this one is quite rare? I only remember seeing one old style D4 on eBay recently and it was not this old, I am trying to get a feel for what a D4 this old might be worth in today's market?
The smooth black boiler house with the simple chimney mount plus the loop style rod all make this an interesting variant to me.
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