Overview of Plautilla's Coinage by Potator II

There are five main types of portrait for Plautilla’s denarii at the Rome mint :

A - With a draped bust right, hair coiled in horizontal ridges and fastened in bun in high position. Her facial expression is juvenile
B - Hair being coiled in vertical ridges, with bun in low position. Plautilla looks here more like a young beautiful woman
C - The third bust shows a thinner face of Plautilla with hair in vertical ridges and no bun but braids covering her neck
D - The fourth type has a similar appearance with the former, but the vertical ridges disappear, hair being plastered down, still showing the right ear
E - Plautilla appears with mid long hair plastered down and covering her ears

In the mean time there are seven different reverses :

1 - CONCORDIAE AETERNAE
2 - PROPAGO IMPERI
3 - CONCORDIA AVGG
4 - CONCORDIA FELIX
5 - PIETAS AVGG
6 - VENVS VICTRIX
7 – DIANA LVCIFERA

Not every combination exists, but some of the above reverses can be shared by several obverse portraits. Noticeable also is an evolution of the obverse legend, being PLAVTILLAE AVGVSTAE (a) in 202, and becoming PLAVTILLA AVGVSTA (b) soon after.

Taken with permission from the gallery of Potator II:
http://www.forumancientcoins.com/gallery/index.php?cat=11724