RPO-U15 Speed warning indicator. I know they existed in 1967 but I don't have production numbers (or proof they existed) for 1963-65. That doesn't mean they didn't, just that I have no documented proof.
Man you guys got tricked !! I know that is for sure a chevy Bread delivery truck cluster , They had the speed warning for the drivers to keep the speed down , I know its of those big bread truck that delivered to grocery stores .. I taken a few off from bone yards.... The nova style instrument clusters where used for decade on some of them trucks !!! FYI
My Nova doesn't having a "speed warning indicator" but I think my daily driver does. It seems like anytime it goes over the posted speed limit, a blue light flashes in the rearview mirror. Never see that in my Nova though. Strange.