I've got one that fits the your bill.
Quite presentable no name rh silver crank arm with black chainrings, need to double check if 52 or 53, but fairly sure 52. 170 arms I think (important that you check your lh).
Fully functional square taper.
£10 posted.
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really dont care how it looks as long as it works and is cheeeaaappp!
sheared the pedal out of mine on the beater today, literally no threads left.
hench yes.
cheers.