Pretty sure it is period correct. I talked to the curator for a while about the entire collection. This museum is incredible. It rivals some of the pre and post civil war collection at the Smithsonian. If you are in the area, check it out.
That's awesome! They used to broil (we call it grilling) and barbecue food on those. That was the time when people knew the difference between roasting, broiling, and barbecuing. It was many times referred to by the old timers as a "gridiron."