would they have ever written it like that, anon?
just like we think that XIV is fourteen, and that is correct to us, it turns out that 14 was very often written like this: XIIII
huh.
I think that if it's a hundred plus fifty they probably would have written it CL
I'm not an expert but you'll have to look to epigraphics to find the real answers to this.
I vote for English number 150 being CL,
but LLL would probably have worked too.