The Sixpence (or Zac) was the only Australian pre decimal coin to have the same reverse in the entirety of its production life (1910 to 1963)
The only change over the years was the monarch on the obverse and the change in silver content in 1946
1910 Obv - Edward VII


Reverse

1939 Obv - George VI type one (IND:IMP in legend) - coin has a bite as well


1950 George VI type 2 (IND:IMP removed)

Elizabeth - 2 types: with and without Defender of the Faith

1953 without F:D


1962 F:D added

Now the fun part, a few errors
1956 Broadstrike Obv


1956 Broadstrike Rev


1962 Planchet Flaw


1962 Misstrike Obv

Cool - thanks for sharing them. Like the broadstrike too.

Missed the 42 and 43 Sixpences produced at different Mints (san Francisco,Denver and Melbourne)

Reverse Melbourne


Reverse San Francisco


Reverse Denver