I have a used but supposedly good starter motor but not sure of it's origin. How do you tell the difference? What are the Bosch p/n's for both? Are they stamped into the case?

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked