Well, I hate to critique my own post, but doing a little more research online, and they might have used a holster from the A. E. Nelson Company, the #58-U ("U" for "Untouchables"?) I'm still researching, all these years I was under the impression that it was the Lawrence holster #7.

Best Regards, Les

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SWCA 3084, SWHF 495, PGCA 3064