The picture is a bit blurry, but I thought I saw part of the stitch cam function under the bobbin winder. It's hard to tell what it.
It's this type of cam function I was thinking of, but this is for a Mira wich is very similar. I have had my eyes out for a Necchis, and they turn up only once or twice a year near me; at least at a reasonable distance and price. Either way, it's doesn't matter much, I would happily settle for a swing arm model with a nice neat satin stitch.