This red baseball-style cap was worn by the transportation captain of the Perry Mason made-for-TV movies, filmed in Colorado.  The cap was given to TV producer Paul Mason as a gift from the crew's "transportation captain."  Paul Mason was production manager for many of the Perry Mason TV movies produced in the late 80's and early '90s, starring Raymond Burr and based on the TV series starring Burr that ran from 1957 to 1966.

The transportation captain is responsible for the daily transportation schedule of the cast and key crew during a film shoot