Officially this stock is classified as Mat'54, but it is better known
under is nickname "Hondekop" ("Dog Face"). The original class consisted
of 2-car and 4-car EMUs painted in green. Some 2-car units had a blue 
livery and were suited for use in Belgium. Some 4-car units were later 
refurbished for InterCity use. These got a blue band around the windows.
The other units got a plain yellow livery.