This is a nice, used, original GM, metal, chrome drivers side headlight bezel for some 1979 and all 1980 rectangle headlight Chevrolet Silverado C10 pickup trucks with chrome grills.
The part numbers stamped on the part is LH 14010855.
This is driver quality, but would be good candidates for re-chroming. The housing on the back is cracked, but could be used. The lens needs to be replaced. Please see the photos for details.