You cite Stevenson's explanation of c. 1850 (he died in 1853), not published until 1889. I think this distinction between
legend and
inscription is not generally made today; I wonder where
Stevenson got it.
Melville
Jones,
Dictionary of Roman Coins: "
Legend (literally 'what is to be read'). A
legend is the
writing or
inscription which is placed upon a coin as a
part of its design, as opposed to a
mint mark, mark of value,
countermark or graffito. It may give the reader information about the person or persons by whose authority the coin is issued, identify the
type which appears on the coin or convey a message which is religious or of some other kind."
By this definition I think the dates on Alexandrian coins would not be
part of the "
legend", though both they and the
obv. legend would be
part of the "
inscription", which is the more general term.