an SNCF 2D2 5500 class electric locomotive at Paris Massena in 1977

This 2D2 type 5500 class of the SNCF (originally a Paris-Orléans locomotive) from 1937, 1.5 kV DC, 2,888 kW continuous output, used to 1978, was known as the femme enceinte or pregnant woman for obvious reasons.