1971 1972 bumper differences

What is the difference between the 71 and 72 buick gs front and rear bumpers?

Please post pictures

 

Just the rubber moldings. rubber surround on the rear tail lights and rubber strip down the middle center on the front.

 

And 72 rears have a 'BUICK' script in the center.

 

Believe the profile on the front bumpers are very slightly different. Look at the area along where the holes are punched for the rubber strip.
Discussion here a couple years back comparing front guards. Notch on the '72 for the rubber strip, yes, but profile a little different from the '71.