LGB 22771-039 Porter Axle gear (old version with the Chinese square motor )

28 tooth gear with a 10-degree angle for the LGB ToyTrain steam locomotives of the type OHO, OTTO, Porter, Daisy, Emma and Rusty 

Used in the following locomotives:

Otto, OHO, Gearbox, Toy-Train, Gear, Teeth, Emma, B-Gearbox, Engine, Gear Block, Porter, Rusty, Daisy Locomotive 24772, 22772

Note:
The were different versions of the Porter engine made, for more information about the different  wheels, Gears and Motors (Click here)