10 Dollars

Australia's paper $10 went through an unusually long run with multiple signature combinations, and the Knight & Stone pairing alone produced two visually distinct serial number variants — a straightforward font and an OCR-style font — making it one of the more granular collecting points in the series. The shift reflects changing banking administration technology during the period rather than any monetary policy change.

Seven signature combinations across roughly seventeen years is a high turnover rate for a single note type, driven by the frequent rotation of RBA Governor and Secretary appointments during a period of significant economic volatility in Australia.