While probably the most common date in the series in lower grades, the case is perhaps very different in mint state. With the highest mintage in the series, there is no doubt that sorting through a sack of circulated shillings will yield numerous examples of this date but the case in mint state is often very different. The reason being is that
Now of course nobody is going to bother sending circulated examples of this date to PCGS as they're almost as common as sand so it would be more realistic to compare the number of mint state examples that they've handled, which would put it at equal lowest in the George VI series with the 1942, another potentially scarce date. The 1941 and 1944-S on the other hand have the highest populations of the series with 30 and 37 respectively (PCGS Population Chart, 2009) demonstrating the influence that notable hoards have on the survival rate in mint state. I have only encountered 1 bank roll of the 1943 San Francisco shillings, offering 40 mint state examples which would probably range from MS62 to MS64 if slabbed and so while the 1943 San Francisco mint Shilling probably isn't scarcer than the 1940, it is certainly an underrated date of the series and one should not underestimate how difficult they are to acquire, especially if sought in the higher mint state grades.
