There were no 58 P basses with black guards.
Unless gold ano turns black when it's "roasted".![]()
LOL!

Fender plays pretty loose with their model designations. The only thing conforming to '58 specs here
are the neck profile (kinda), and the tug bar.
The Fender Custom Shop has a line of "post modern" basses, a designation which gives them full license to mix n match different
parts in a way that totally scuttles the notion of identifying the specs by the year referenced in the particular model's name. Perhaps when designing "post moderns" the Custom Shop throws BOTH names and parts in the air?