The griddle is double gate marked and has unusual (to me) "pads". Is this "authentic" or just a reproduction? In case it isn't legible, the "tab" at one end has a raised 8. The other looks like a "C".
https://imgur.com/RwbanLi
https://imgur.com/X1fOlA8
https://imgur.com/Ii5AOjg
https://imgur.com/U65EF5Y
https://imgur.com/RwbanLi
https://imgur.com/X1fOlA8
https://imgur.com/Ii5AOjg
https://imgur.com/U65EF5Y