First introduced in 1975, the design is based on the earlier 8000 series design.

The 121 series design is based on the earlier 105 series, with lightweight stainless steel bodies.

Based on the 5000 series design, cars are 18 metres long and have three sets of doors per side.

The 735 series design continues the basic configuration of the earlier 731 series with longitudinal seating throughout.

The design incorporated a number of further minor changes to the previous 10030 series design.

Based on the 5000 series design, cars have four sets of doors per side.

The class were based on the French Admiralty 630 series design, but with more power and better armament.

Both new banknotes are almost identical to their original third series designs.

Both the 54 and 62 series designs remain in use.

Three minor variations to the standard new series design have been shown.