1938 2.9 8C Alfa Romeo Le Mans Coupe.

 
 

The pattern blocks are first squared off to match the templates. These then have their corners rounded to match the side templates, and any shaping completed to conform to the original plans, Patterns are cut for the windows and recessed into the master pattern, and weak points are strengthened with brass inserts.  The complete pattern is held together with cross bolts at the wheel centres.