However, this one seems to show up pretty frequently - I wonder if some were minted in 1829 or later and not included?
Please do not leave out the following 19th C. coins -
groat: 1847/6 in top condition (because this is the "1847 coin in the series), 1853 currency which is a BEAR to find
sixpence: 1848 is likely the 2nd toughest after the 1854 in top condition, top-notch '93 Jub is a "name your price" coin probably
shilling: 1848 in mint is very tough, 1850 is as well (not publicised: I think top 1848s are the second toughest in the Vick shilling series and def. harder than the 1854) ,1851 pretty scarce in top condition
florin: the 1854 in EF and above is well-nigh impossible, 1863 in better preserved states is very rare
half crown: the true currency 1839 is perhaps top of the heap, although the 54 florin in the running. the 1841 mentioned & the 1843,1848s are nothing to sneeze at, please don't forget the proof-only 1862 and 1864 in plain and milled edge iterations
PS - left out all the patterns & all as I tried to keep out overdates. The 3d series is rife with scarcities but because of the continuing Maundy issues, would leave them out. If true currency: 1841, 1842, 1847, 1848, 1852, 1853, (cheating with the 1868 RRITANNIAR)