The beaded ring around the oval is not one continuous piece, and the places where it joins were chosen with some care.
Beads on an ellipse are an awkward problem. The curve tightens at the ends and flattens along the sides, so a bead cut at a constant spacing will look crowded at the top and bottom and stretched at the flanks. Our artisans set the ring out in four segments, taking the joins at the quadrant points where the curvature is changing fastest, and vary the bead pitch subtly within each segment so the spacing appears constant to the eye all the way round.
The joins land exactly where the curve is moving quickest, which is where the eye is least likely to pause - and the garlands cross the frame close to those points, so anything left to notice is covered by a rose.
You are not meant to see any of this. You are meant to see a ring of beads that runs evenly around an oval, which is a thing that cannot actually be cut in a single pass and has to be constructed.