MLB Style Guide Angels Cap

I recently got my hands on one of these.

It's a copy of the Major League Baseball Style Guide.

While it does not have a date on it, it appears to be from the mid 1990's.

Based upon this logo from the section on the Milwaukee Brewers, it is at least from 1994.

The Style Guide lists every MLB team, official uniforms, caps, as well as primary and alternate logos.

 What is this?  I have never seen this  cap before.  

I  searched the internet for a picture of an Angels player wearing this cap.and could not find one.

Has anyone ever seen one before?

Anybody have this cap?