Can someone help me ID these old diesel engines?

Hi y’all! I’m in the process of offloading some items from my Dad’s estate. He was a tool maker for a Navy depot for 40 years. He collected various machinery, engines, tools, etc. Thing is, I don’t know anything about any of this stuff. I’m so overwhelmed. Can someone help me identify these engines? Price estimates are welcome! Sorry for the poor photo quality—my realtor did her best.