Absence of the Symbol Resembling '4' in the Very First Folio 1r

[Dobri]

So, on the left-hand side it's both 4-like 4s and 4-like 5s? Interesting, I think I've never seen them used together.

Indeed, it appears that the 4-like numeral 5 was the last one of the decimal numerals that had to undergo a further transformation because the numeral 7 was also depicted in its modern form.