This is a modular cabinet / credenza from the Made to Measure series designed by Cees Braakman and produced by Pastoe in The Netherlands circa early 1960s. It consists of four parts; Two cupboards with sliding doors, a chest of drawers, and a pullout surface that can be used for a desk surface. This particular example is in excellent vintage condition with original keys. See photos.

The cabinet measures 96 inches long by 18 inches deep and 54 inches tall.