Well, you have a lid that says Imperial Kamado.....
But the rest of it screams Hibachi Pot!
....or Sakura Kamado
....or a Noritake Kamado
...or
But who really knows?
They were usually shipped unassembled, and parts could easily have been switched at the warehouse by the distributor. There were a few companies that made Kamados in Japan and when they retired, forms and operations went to Taiwan and China. Some parts got intermingled with others, especially rings and fireboxes.
If you download the Kamado Manual from the Naked Whiz site, it gives instructions on using mortar to level and secure the firebox and ring if they don't fit properly.
The lids with the dog ears on them are the traditional K's and were handles for lifting the lid. Richard Johnson of Kamado.com claimed to have "invented the band hinge and replaced the plug damper with the slider vent. Obscure stuff I found in their forum archive.
Imperial Kamado was base out of Carson CA, and when Mr. Mako retired sold the biz to Augie at Kamado King in NY. I'm glad I copied all I could from the original IK website, because it was a treasure trove of historical information.
So, its 40 or even 50 years old, and if its in decent shape, it'll probably last a long time if you treat it right.