Another great item with this listing are the included instructions, which I didn't pay to much attention at first - since
I have a set. Though this one is different than the one that I have. This one instructs on one three different No. B-43 & No.62 Engines.
1. Regular Engines
2. Reversible Engines
3. Engines Equipped with a Pump!
Isn't that cool! The paper isn't in the best shape but it is readable.