Seen screws with this odd head?
It is a “Clutch Head Screw”

It was briefly popular around 1968 and designed to stay on the screwdriver during assembly or disassembly.

My grandfather bought a “radio with reach” Motorola XP7C which has those.

https://radiojayallen.com/motorola-xp7c-xp7ce-am-portable-radio/

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