Here are a few pics of the inside and the details.
The shelf is adjustable and sits on wedges located into holes cut in the sides. The carcass is made from Pine or what the timber merchants sell as Pine nowadays. The draw is a standard setup with router cut dovetails at the front and rebates at the rear.
The drawer frames and the bottom are rebated into the sides with dabs of glue and brads and the drawer runners are hardwood with PTFE for friction free movement.
The rear panel is 3/8" ply which sits in a recess. Finally it stands on feet made out of 2" square stock which reinforce the bottom mouldings.
All of the timber is 3/4" stock and there is no finish on it as the customer is going to wax it himself.