Using the selected wood, rip the boards down to the measurements needed using a table saw.
Run the front of each piece through a router table with a raised panel bit, adding a beaded detail.
Cut interlocking joints on the end of each frame piece so that the pieces fit together (Image 1).
With the elements all cut and routed, glue and assemble the frames.
To ensure that they are square, measure the assembled frames diagonally from corner to corner, across both diagonals, to ensure that both measurements the same length.
Once you're certain that the assembly is square, clamp securely (Image 2), measure one more time and allow the glue to dry.
Remove the leaded glass panels from the existing frames. In our case, we used a pry-bar and chisel to carefully remove the glass-stop trim pieces (Image 3).
Carefully place antique glass panel into the new frames (Image 4).
Carefully nail on the glass stop to secure the glass in the frames (Image 5).
Repeat the process for all of the doors.
Finish to match the body of the cabinet.