I picked up this machine ~10 ago in Munich. No idea what this machine could do or not or if it will suit my need at all. You barely find information on the 51W machines and especially not on 51WSV2 (Special Variant) - I mean stitch length and so forth...
However, I did a lot of research and figured there are 2 different 51W post bed models. Mine is the earlier one based on a Wheeler & Wilson N12 (as it seems). I found a picture on Alex Askaroff´s website (scroll down). The later models