I picked these up at an estate sale today, not sure for what purpose they were built? They were in the same room but attached to different walls.
Maybe previously bought from a carpentry class environment? 16 stations, 1 or 2 students per work bench? Each station a different task or skill thus the holes (hold tools?) in one but not the other?
I was thinking the same from a trade school or factory. Dovetails look hand cut. They are pretty cool.