Vintage Key Imperial Railroad Hat Cap Engineer Conductor Train USA Sanforized

Description

This is a vintage train cap made by Key. It has a KEY Imperial cloth label on the front (see closeup photos). The label shows that the cap was "Sanforized".
It is soiled and all size information has been removed, but I measured the circumference at just less than 22", which would make it about a size 7.
Please measure the circumference of your head to insure it will fit if you intend to wear it. See high resolution photos for more and use the magnify feature.