Got my Nautilus in last night, very nice indeed.But not so sure it's an actual, genuine Sellita Sw200 in it.It sure looks like one from the QC pics, but lacking its sw200 markings under the balance wheel.Has all the perlage and proper shaped rotor, but no markings at all.Bought it from a TS, but I'm afraid I got a knock off of a Sellita inside.The rest of the watch is very nice.Not sure what to do here.