Green’s Dictionary of Slang

ting-a-ling n.

[rhy. sl.]

(Aus.) a ring.

[US]Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
[Aus] ‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xli 4/4: tingaling: Ring (jewellery).
[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 47: Ting a Ling Ring.