Thanks for kicking this one off, EFLC, with a nice coin. I will add my notes.
Annia Cupressenia Herennia Etruscilla married Trajan Decius some time before 230 but gained the title Augusta when Decius ascended to the throne in 249 after the defeat of Philip I near Verona. The sources for third century Roman history are comparatively thin, and authentication of reports is meager, so little is known of her life. Yet we may infer that she was likely of a senatorial family, inasmuch as she became regent for her son Hostilian after her husband and her older son, Herennius Etruscus, were defeated and killed in the Battle of Abrittus. However, after Hostilian's death of the plague in 251, Herennia Etruscilla slips yet more firmly into historical oblivion.

I have been apprehensive about posting for this figure. My examples of her coins are few in number and not very attractive. (Coins not on a black background have been purchased but have not yet arrived.) Moreover, though fairly plentiful in low grade, material in her honor is quite limited in variety if not in volume. What there is, is not well understood. The editor of the Introduction (Mattingly?) in RIC expresses it this way, "The coinage of Etruscilla has only one obverse legend, HER. ETRVSCILLA. AVG., and offers no immediate materials for dating. She has two varieties of coiffure, but their significance for dating has not yet been made clear. Probably, the one without ridges, but with a long plait carried up the back of the head, is the later."
This is where I wish to begin my discussion of her coins.
Coiffure Style 1The image above shows the earlier hair style, which is very similar to that we see on the coins of Otacilia Severa, her predecessor. This has the hair combed down its length then plaited in waves front to back.
Draped bust right on crescent, hair waved and tucked at back of neck, stephane in hair
Coiffure Style 2This next coin shows the later hair style as Mattingly described it.
Draped bust right on crescent, hair in straight lines with long plait carried up the back of head, stephane in hair

In RIC the coins of Herennia Etruscilla are listed in a section for her among the coins for Trajan Decius. In the case of silver, there are listed two mints to consider, Rome and Antioch. However, all the issues of Antioch are noted as Rare in RIC and are seldom seen in the marketplace. Our display will be limited to the issues from the mint at Rome until someone here finds and shows something from another mint (not counting the occasional hybrids of questionable origin.)
Far and away the most common reverse types for her from Rome bear the inscription
PVDICITIA AVG and feature the figure of Pudicitia either seated or standing facing left (see above), holding a scepter in her left hand and fussing with her veil with her right hand. On that last point, there is some variation in the manner of her handling of the veil. Here is the
seated type showing a long, strong strand of the veil, which is followed by progressively weaker representations down to no apparent veil (especially on a weak strike).

The form of the type with Pudicitia
standing follows a similar progression.

No sense of chronology has so far been associated with these variances.
Next most common, though not seen anywhere nearly as often, are the types bearing Fecunditas standing facing with head to left, holding a patera in her right hand and a cornucopia in her left hand. There is a child to her left reaching up and tugging at her gown.
There are two forms of inscription for this type. The first is
FECVNDITAS AVG with a single final "G": (singular)

The second reads
FECVNDITAS AVGG (plural)

A third type used at Rome, and least frequently encountered, features Juno standing left, holding patera in right hand and long staff vertically in left. At her feet is a peacock. This is the same posture encountered with earlier Juno reverses bearing different inscriptions.
The reverse inscription reads:
IVNO REGINA
Better grade examples of all these coins can be seen at the educational website prepared by Zach Beasley (formerly of Beast Coins, now with
Heritage).
https://www.beastcoins.com/RomanImp...ruscilla.htm