With the electrification of the Sydney suburban network planned, in 1919 orders were placed for 100 carriages with contracts awarded to three builders, Clyde Engineering (42), Ritchie Brothers (18) and Meadowbank Manufacturing Company (40).

The carriages gained the Bradfield carriages nickname after the New South Wales Railway's Chief Engineer John Bradfield, even though they were designed by Chief Mechanical Engineer Edward Lucy.

[3] All initially entered service as locomotive hauled stock with eight seats fitted in what would later become the driver's cabin.

[2][3][4] In the mid-20s 183 American Suburban end platform carriages were converted into trailer carriages numbered T4101 to T4284 along with a further nine converted into driving trailers numbered D4001 to D4009 The last Bradfield motor car was withdrawn in 1975 with two preserved.

This car were previously owned by RailCorp (now Sydney Trains) but was sold to SETS in 2008 (along with C3104 and C3444).