My cousin picked up a 1927 Grahan Brothers truck and this plate was on the dashboard. It's about 3.5" X 6". Pretty darn restrictive warranty, glad my daily driver didn't come with the 25 mph restriction or my commute would be a bitch!
Cool find! I was kicking around some shit in my favourite junkyard and pulled out a Graham Brothers van windshield frame! It has a small brass tag on the wood proclaiming the maker.The back doors of the van are still standing there......