Superb Loot #7: Go inside building #2 (underground) as marked on the map. You can enter the building from the western side. You can find the Superb Loot on a raised platform after you passed the first door.
Superb Loot #8: Go to the right and continue exploring the underground area.
The next superb loot is located after getting down two stairs and is inside a barred room (look more like a giant pillar). Use the knockfist to blast the weaker wall.
Old World Gadget: This is a computer (monitor) on a desk, further inside the underground area on the left side.
Solve the puzzle by rotating the nodes to match the color.