Something is off. That is a '73 front bumper, but it must be mounted in an unusual position because the front side marker lights are partially hidden by the edges of the front bumper. Buick wouldn't have done that.
I don't know, nothing looks obviously smushed in to me. If you move that bumper out 4 more inches it will be in the next town. I know those years the bumpers stuck out a lot because they had those new federal regulations but still.... Maybe the 5mph impact thingy's never came back out after they got hit. I've never seen this before. Weird.
Maybe he tucked it in on purpose. Seen a lot of guys do that on 70s cars by removing the bumper struts and making brackets to set the bumpers in closer.
The 1973 Century fastback that buickbill has for sale in cars for sale section has the same bumper setup kind of covering marker light.