An interesting review of the question, but I am not convinced by Woods' suggestion.
"
Caesar has gone" is just too mysterious for an
inscription on a coin, in my opinion.
Coin legends should record an undeniable benefit or accomplishment and be explicit. Compare some of the other
Roman coin legends that include verbs, all in the simple past tense, not the perfect:
"Memmius as aedile was the first to celebrate games for
Ceres."
"At the age of 15 he killed an enemy and saved the life of a fellow citizen."
"Having established
peace for the
Roman people on land and sea, he closed the
temple of Janus."
"As
consul for the 14th time he celebrated saecular games."
We may not know why a
Roman commander of this period would record
his age on coins, but one apparently did, namely
Mark Antony with A XL and A
XLI (Year 40, Year 41) on
his Gallic quinarii of 43-42 BC,
Crawford 489/5-6. It seems to me that this supports the interpretation of LII on Caesar's coins as representing
his age, though
Woods wants to argue that the absence of A ('Year') before Caesar's '52' should mean that it wasn't a numeral specifying
his age!