I prepared all the ash and pine boards and rubbed pairs of them together to form the relevant carcase and dustboard panels. When dry, I tidied up the panels and cut the dovetails and dustboard housings.
Being a mid-century case, the 3/4″ thick drawer dividers are made separately from the dustboards (compare with this earlier method of construction) and have their ends half-dovetailed into the carcase sides (fig. 1).
Fig. 1. Pine drawer divider housed into ash carcase.
The 1/2″ thick dustboards are glued into rebates in the upper rear edges of the drawer dividers (fig. 2).
Fig. 2. Underside of divider/dustboard.
Fig. 3. Dividers dry-assembled in carcase.