Az angolul tudóknak:

"I have been using the Sellita movement for some of my watches for a few years already and have very good experiences with the movements. 

The SW200.1 is not compatible with the 2824, some parts could be mated but I had bad experiences with it. The winding shaft is different, the change wheel will only work for a few days before it eats hard, automatic bridge does not fit either, anchor, restlessness....etc.
I buy the spare parts directly from Sellita and they are much cheaper than ETA components. It depends where you order. After all, Sellita can't help it if individual middlemen beat 100%".