The one in the top looks like a 19th century version of a college football mascot. You put that thing on, whether you drown or suffocate, you're a goner.
@Barefooter25 Presumably the hose projecting from the apex supplied your breathing air, but that hose does not inspire confidence.
The fatal flaw with that system is that if the air in the suit must always equal or slightly exceed the water-pressure outside. If the supply or exhaust-valve fails at depth, the water-pressure on the fabric suit may try to compress the diver into the rigid metal helmet....
