The one on the left is on of the really old york 'isometric racks'...those things do look shallow, but I'm sure they had/have their uses. The one on the right is from a recent craigslist ad somewhere, and looks quite a bit deeper than the original ones.
I actually just bought a custom one of these for $100 which somebody made decades ago based on the old york design, as a second rack to have in my garage for various reasons. It has an interesting feature in common with the one on the right above in the hole spacing.
Every other hole is 'small'. The j-hooks are this weird design with a small post that plugs into the small hole. Larger solid safety pins go through the big holes. It ends up giving you terrible hole spacing all things considered, but you'd still have several ranges to work through for partial motions. It's also 8 feet tall and built like a tank.
You can probably expect having to make adjustments to something (the platform, the bench, getting creative with something else) to find a good setting for bench, though.
Just wanted to add a link to a real interesting article about the use of the old-time racks. It has a detailed description of their use by Bob Hoffman and explains what the system was supposed to be about. It's got plenty of pictures of the rack in use for the weightlifting equipment archaeologists out there.