Of those .....
I just bought an 1827 in GVF at London Coins. They don't show up very often.
1848 ... still waiting for one of those to appear at auction.
1854 ... there have been a couple of examples in the last two years.
1862 ... there was one at Heritage but you don't often see them
1863 ... rare but they do show up at auction fairly often. I bought mine at Heritage in MS65 for a pretty fair price.
1869 ... bought mine at Glendinning's (ex. Willis) in 1991. Have not really been monitoring auctions for them.
1870 ... bought one at DNW three years ago ... same as above, not monitoring.
1879 ... with die number .... still in the market for this one.
1882 .. I now have two but it took me a long time to cover this date.
1893 ... seen a couple of these at auction over the past few years but hard to get in good condition.
Other Victoria sixpences ......
There are quite a lot of varieties and errors some of which are more common than others.
1844 - large and small 44 ..... shows up reasonably often.
1850 & 1855 - both 5 over 3 and fairly rare.
1878 - 8 over 7
1878 - Dritanniar - hard to find in good condition as this batch was sent to Cyprus and most are heavily worn.
1887 Patterns - some interesting coins here but hard to find.
1887 Errors (e.g. R over V) - more common than ESC leads one to believe.
Old thread i know but whilst going through my 1960's pennies looking for wavy exergues I came across this. Not as high grade as Terry's but never mind.
Also found a 1967 missing wave too.
I'm a relative novice but I think these are fairly key dates for shillings,, florins and halfcrowns:
1905 - for shilling, florin and halfcrown
1841 halfcrown
1850 and 1854 shilling
1854 florin but very rare. 1862 and 1863 also pretty rare
1892 and 1932 florin
Wreath crowns from 1928-1936 are all pretty rare but 1934 is the key date
If you go a little further back to William IV and George IV:
1837 halfcrown
1828 and 1829 for halfcrowns
1827 shilling