NO - the diagram is not correct.

Main error: the three filter pieces are stacked in the wrong order.
- The diagram shows, from top to bottom: spiral plate (4), mesh screen (5),
  cross plate (6), then the retaining nut (7).
- On a real plunger the cross plate sits on top. It is the spoked disc you
  see when you look down into the press. The mesh screen goes in the middle,
  and the spiral plate goes on the bottom. Its spring coil around the rim
  presses out against the glass, and the nut or threaded foot holds the
  whole stack on the end of the rod.
- So parts 4 and 6 need to swap places. The cross plate clamps the screen
  down onto the spiral plate from above.

Labeling error: the bracket marked "3-piece filter" covers four parts. It
runs from the spiral plate down to the retaining nut. The nut is a fastener,
not one of the three filter pieces, so the bracket should stop at the
lowest filter plate.

Parts that look right:
- Knob, lid, rod and filter stack all sit on one center axis.
- The lid's pour notch lines up with the beaker spout.
- The handle is on the opposite side from the spout.
- The beaker is drawn a little narrower than the frame, so it can drop in.