Page "RER" Paragraph 18

The first RER rolling stock in fact predated the formation of the RER by 40 years, with the Z 23000 stock used on the ligne de Sceaux ( which was subsequently integrated into RER B ) from 1937 until February 27, 1987.

In 1965 the Z 5300 train was introduced, followed by the MS 61 in 1967 ( refurbished 1985-1987 and 2006-2009 ), MS 79 in 1980, MS 84 and Z 8800 in 1985, Z 20500 in 1998, MI 2N in 1996, Z 20900 in 2001 and MI 09 on December 5, 2011.