Don't get me wrong, I'm not saying they have a defective clutch, just saying that the strain adds to the problem. Also when you are screwing in the crown the winding gear turns the hatched wheel and this is a problem for the SW200.
Just read the Sellita service manuals. They admit the SW200 hatched wheel was badly designed, fragile and prone to damage (well since the Sellita is a clone of the ETA 2824-2, just like the Asians, bad designed parts are not a surprise).
They have redesigned it with the SW200-1 and you can in fact make your SW200 into a SW200-1 if you replace a bunch of gears.
So you can see why the SW200 rejects will be cheaply available for the rep factories.
The Invicta forums have tons of threads with folks complaining about their SW200 crapping out. This is not a newly discovered issue.