The Y1-class was a class of four trams built by the Melbourne & Metropolitan Tramways Board built as a modified version of the Y-class to trial one man operation.

Initially used on East and West Preston routes from Collins Street, from 1934 they were transferred to the Toorak line.

[1][2][3] In 1965, the class was transferred to Glenhuntly depot to avoid running into the city due to a lack of number boxes.

[4] Withdrawn in 1965, they were retained as driver training cars at Hawthorn depot with 613 having just been overhauled at Preston Workshops.

[5] In late 1990, 611 was briefly used in regular service out of Kew depot.