[E-Revonut]

I used to make motors like that, they have various applications but the shaft and end housings usually dictate a specific application. If it was a starter motor there is a lot missing to it as starters generally have a bendix type gear attached, a gear that moves out of the way once the motor starts. My best guess is that it once powered a spall hydraulic pump. That is one of the most common uses for this size dc electric motor.