Sure, mine is a 9W-7. Uses the 221 style bobbin. The serial # is: 3220806.
The machine itself is just like yours. I can't say anything stands out about it.
Well, one thing does. Somewhere in it's life it was converted to use 15x1 needles. A 127x1 is way too long, with interference problems under neath.
It came in a 5 drawer treadle with the middle drawer that has the cut out spaces for the attachments. The drawer fronts have fancy filigree type designs on them. Don't know what that's called.
Joe