This bracket had been made into a chauffeurs window divider on an economy car, in front of the rumble seat. The scale was off, and it looked really out of place. Looking closer at it, it has a LH/ RH index to it. The only marking, or casting is a number 3, centered on the back of the mounting bracket. It measures 14” long overall. I’m thinking that this is a wind wing bracket for a large luxury car. Any direction, or confirmation would be greatly appreciated.