Prosaic
Well-known
Pull the batteries out of an FM3A and you're just as "electronic gizmo" free as an FM2, plus you get the brighter K3 focus screen (can be installed in an FM2 as well).
I am not sure the FM3As hybrid shutter can be as easily serviced as the mechanical FM2. If I dont want automation, why chose a camera that supports it? The FM2 is almost unbreakable, meter aside. Is this true for the FM3A too? Perhaps not.