Mine is a one-piece steel frame that the radio and speaker both mount to. It secures to the console with two screws on each side, but arranged vertically, not horizontally like the pics showing the bracket on the radio itself.
If you look closely at my picture below, you can see the screw heads on the side of the console. Yeah, it's kind of a weird angle, but it does fit. That's the original no-name mono radio in my car. It's broken now, but I've heard a little fishing line might fix the tuner...
-Dave

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Colorado '71