First time I saw it was about 24/25 years ago, when Jeff Cooper used it, in the old Southwest Pistol League, and when he wrote a handguns column for "Guns & Ammo".
Were you aware of the "DVC" 1911 edition produced by Colt... in the mid 80s maybe. Was a limited edition run. Came in three different configurations. I never saw one personally though have pictures around somewhere of them. Hide site sure is 20/20... wish I'd gotten one now.
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If you carry a gun, people will call you paranoid. That's ridiculous. If I have a gun, what in the hell do I have to be paranoid about? (Clint Smith)