Reverse A replaced by Reverse B in 1937 (a very small adjustment to the design)
The final debasement to cupronickel in 1947
The removal of the claim to India in 1949
1938 is a trickier date than its neighbours, in keeping with the principle of
the "second date". People tended to hoard the first issue of a new monarch or
effigy, but not the second. It is useful to compare the following date pairs
with this in mind:
1887/1888
1902/1903
1911/1912
1937/1938
1953/1954
As they circulated so long, well into the 1980s as decimal 10p, the
cupronickel issues are surprisingly difficult to find in mint state.
Circulated examples abound, but top grade coins are worth waiting for, if
you can find them.
A slightly different reverse was used for 1951, ever so slightly different,
but different enough to warrant its own Davies reference.
Check if there was a florin for 1952