Is anyone familiar with the old Robert Kirk brand?

[Dark Arcane]

I'm speaking of prior to Robert Kirk Ltd. being bought by Cable Car Clothiers, which was I believe in 1972. I ask because I've got a very cool Robert Kirk fedora, which does not have the Cable Car name anywhere in it, so I assume it predates Cable Car. That, and the simple fact that it's a somewhat wider brim, 2 and 3/4 maybe, and the quality speaks of an older time. It simply looks '50s, or even '40s.

Any knowledge of the history of this company would be very much appreciated. This was a San Francisco company. I've done plenty of Googling, and have hit a wall. I will try to post pics of the hat when I can.

Just very interested in the story of Robert Kirk Ltd. Thanks everyone.