The KM number for Order of Malta has a dash- and an M before the number e.g.
KM-M9 1964 1 Scudo
KM-M10 1964 2 Scudi
KM-M14 1965 2 Scudi
KM-M38 1968 3 Scudi
KM-M51 1972 2 Scudi
so yours (1963 2 Scudi) may be between KM-M1 and KM-M8 perhaps.
Well, those are for the modern coins anyway.
[Note to Admin.] On the page ...
https://en.numista.com/catalogue/ordre_de_malte-1.html
it says Malta, Order of - Scudo (1530-1825) and there are three coins on there, but the first is dated 1981 so is more recent than 1825 (and it is X#85 so maybe yours has an X# number instead).