This is the classiest-looking jewelry box we've seen that can be built in a single weekend!
Glue the Keys into their slots. Once they've dried completely (12 hours or so), use your Table Saw or Bandsaw to carefully saw off the excess Key stock. Finally, use your Belt Sander to sand the Keys flush with the Box surfaces.
Separating the Lid from the Box
Using your Table saw with a blade that takes an approximate 1/8" kerf (Shopsmith's 10" Carbide Tipped Combination Blade or Hollow Ground Blade will work nicely for this job), cut off the Box Lid by guiding the assembled Box against your Rip Fence. Set your blade's depth-of-cut to slightly more than the thickness of your stock. See the drawing for the exact dimensions of where to make these cuts.
The Base Assembly is made from 3/4" x 3/4" dark accent stock (in our case, Walnut). First, cut your Base Sides (F) and Base Ends (G) to size, per the Bill of Materials. Next, miter their corners to a 45-degree angle, test-fitting as you go to be sure the Base Assembly fits properly around the assembled Box Bottom.
Next, use your Bandsaw or Scroll Saw to cut out the recessed areas between the Feet as shown in the drawings. If necessary, use a small Drum Sander to smooth these recessed areas prior to assembly.
Finally, use a hand plane or a Router Table with a Chamfering Bit to chamfer the outside top edges of the Base Sides and Ends.
Tray and Supports
Cut the Tray (H) and Tray Supports (I) to size per the Bill of Materials. Glue the Tray Supports in position and secure them with spring clamps or small Handscrews until they dry thoroughly.