Green’s Dictionary of Slang

bread and jam n.

a tram.

1902		Bulletin (Sydney) 18 Jan. 16/3: Me mother’s away, as I was swiftly flowing up the field of wheat in the bread-and-jam.
1924		G.H. Lawson Dict. of Aus. Words And Terms 🌐 BREAD AND JAM — Tram.
1931		Mail (Adelaide) 30 May 9/5: ‘Bread and jam’ is atram’.
1935		A.J. Pollock Und. Speaks.
1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
1951		Sydney Morn. Herald 1 Dec. see 1902 above.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxii 7/1: bread and jam: Tram.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 21: Bread and Jam Tram.
2004		R.G. Barrett Rosa Marie’s Baby (2013) [ebook] [T]ake a taxi or the ‘bread and jam’ back up to Brunswick Street.