Hmm...My 1950 O'Keefe and Merritt is very similar, but only has "two rings of fire" It has adjustable simmer caps like their inner ring; it has 12,000 BTU per burner compared to their 15,000 BTU. Easier to clean mine by the looks of things.
Toggle, actually think Hardwick got sucked up in the that whole Magic Chef/Maytag thing somewhere along the line, and of course Jenn Air is or has been aligned in the past, so that's probably where they got the idea! LOL