Used Century "V" transom vent. Used on many models starting in 1955 and running thru 1968. Some Century owners add these for "looks" on later model fiberglass boats. With vent screen.
Vent is used and would need to be rechromed to look new.
Most were painted around the word Century either mahogany bilge for wood boats, white for some boats like Coronado's and black on the fiberglass boats in the mid to late 1960's
Even looks good hanging on a wall as nautical decor