Dumica

Its not a dumica, but the link is to a set of photos where this collector purchased Korean knock offs, that look the same as in the dumica trains shown above. According to the author and the photos the motor is non serviceable unless you cut it out of the chassis.

http://sunsthomasandfriends.weebly.com/k...4024351795

Scroll down halfway to the bottom and take a closer look at the yellow #1 train.

Pretty interesting