V3 crenulated!
I've been leaning mostly towards the larger heads being towards, the top of my priority list, since 20mm heads (overall) aren't as rare, but the V3 style could push 20mm up to the top of the list. I haven't seen anything like that before.
Just for the sake of completeness, my overall ranking of the heads pictured would be:
3, 1, 2, 4 (and with crenulated bezel every time)
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