An accident or not, this shot stuck in George’s memory and was later time shifted for the SEs. (possibly to get around an issue with the print they used for the restoration and this artificial brightness?) From the doubleofive SE visual comparison guide:
https://photos.google.com/share/AF1QipMh7UH0DbCPGxQyEOdmfmYiFnh3lgoBNNLCPnHTQnvyCtXQnScSo8L_vR3x6A9y_Q/photo/AF1QipM-E_d2z7v5AEQ37avUDEUwzhpnTdjhsp29NV6h?key=aDFfLXE3clp4SldVcndkalc3UjJ4UlU2ZUlDb0JB

Aside: one way to partially determine if a shot is artificially brightened, check if the actors blink or attempt to shield their eyes.