Just a note on the 1894KB 20-centesimi. These coins were withdrawn from circulation and replaced, but were retained and stored by the authorities. Around the time of the end of WWI, due to shortages, the 1894KB and 1894-95R coins were restruck as 20-centesimi pieces of the 1918-20 "Hexagon" type. (Only the 1918 and 1919 pieces, however, were struck using the old coins; those of 1920 used fresh planchets.)
Many of the "Hexagons" display details of the host coin beneath, sometimes including the date and mintmark, so a "KB" collection might reasonably contain not only an 1894KB 20-centesimi, but also a 1918R(1894KB) and a 1919R(1894KB) 20-centesimi as well. Anyway, it's just a curiosity....
Interesting discussion!

v.