A
rare and interesting
type, known to me on only three
rev. dies, two of them (including that of your coin) used for both
Caracalla and
Geta, the third so far attested for
Geta only, though maybe a
Caracalla sestertius struck from this third die will turn up in due course! Despite wear and corrosion, your specimen reproduces the
types and legends quite clearly, and was struck on an impressively broad and heavy
flan!
Your
obv. die was the most prolific of the period, and was used not only in 210 (
Caracalla TR P XIII), but early in 211, before Septimius' death in February (
Caracalla TR P XIIII, but not yet P M or P P).
BMC pl. 49.8-9 illustrates two
very fine sestertii from this
obv. die, used in this case with two undated
VICTORIAE BRITTANNICAE
rev. types.
The die links make it clear that your date of AD 201-9 for the coin is too early; this
type must have been struck either in 210 or early in 211. We know for sure that a dated version of the same
type was struck for
Geta as
Augustus in 210, with
legend PONTIF TR P II
COS II (
BMC pl. 59.4).