CP 0466-5+0466-0 at Santa Apolónia. These stainless steel bodied DMUs (M+R) were built by SOREFAME in 1965; the latest -major- refurbishment took place in 1997 and included replacement of the original Rolls-Royce engines by modern Cummins units; they were also renumbered from 0401-0419 to 0451-0469. 

Photo by Paulo Santos / Arquivo de Transportes (http://atransportes.multiply.com)