I was winding my 856 thinking it just turned five years old and I should send it in for service when I felt a click and it stopped working. I'm guessing the main spring snapped but who knows?
I've heard Sellita SW200s are subject to damage with overwinding but I haven't been doing that to my knowledge.
I don't know if the service will end up costing much more than it would have anyway. Neither of my Sinns has been very robust - I guess it's just the luck of the draw.
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