I understand , your question is why we should call these coins 1/8 of a
basilikon and not a
billon tornesi as most references do.
I believe it is not a mistake to call these coins 1/8 of a
basilikon since according to the historical sources the value of LPC 36.4 etc. is equal to the 1/8 of a
basilikon and it was used in the commercial transactions as such.
The apparition of this
denomination coincides with the
basilicon coin and the references mention it also as such (1/8 of a
basilikon).
I take it I don’t confuse the board when I call this specific
billon tornese an 1/8 of a b. Certainly I don’t intend to find other names for other
billon tornese of different
weight and silver pourcentage, as this would be extremely confusing.
Regards